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Lenovo T420, What is this where the 3.5mm Audio co...

Q: Lenovo T420, What is this where the 3.5mm Audio co...

Hi Folks,I recently bought a refurbished Lenovo T420 which is a very nice piece of Kit, I am Hard of hearing and mostly use headphones for audio. However, this T420 seems to have something else other than the 3.5mm combo socket in place, on the right corner panel, just before the CD tray. The company I bought it from indicated that it should not be there and they suggested I try to "Pry it out with a needle"?.Obviously I'm not going to do that untill I know what this is and why its there? I cannot connect normal head phones because there is no 3.5mm socket. Can anyone identify what this is please?3.5mm socket should be here

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RELEVANCY SCORE 200
Preferred Solution: Lenovo T420, What is this where the 3.5mm Audio co...

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)

RELEVANCY SCORE 75.2

Hi Folks,I recently bought a refurbished Lenovo T420 which is a very nice piece of Kit, I am Hard of hearing and mostly use headphones for audio. However, this T420 seems to have something else other than the 3.5mm combo socket in place, on the right corner panel, just before the CD tray. The company I bought it from indicated that it should not be there and they suggested I try to  "Pry it out with a needle"?.Obviously I'm not going to do that untill I know what this is and why its there? I cannot connect normal head phones because there is no 3.5mm socket. Can anyone identify what this is please?3.5mm socket should be here

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RELEVANCY SCORE 56

Hello,I have a Lenovo T420 laptop 4236AR2 (integrated graphics Intel HD graphics 3000).Can you tell me what version of DisplayPort supports this machine: 1.0, 1.2 or 1.3 or something? Thank you in advance

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RELEVANCY SCORE 56

Hello I have tried to create GPS-connect but without success. I`m put the SIM-card (no in use) to the right place. I have checked the drivers and Device Manager but everything seems to be OK. I have no idea what else I can do? 

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RELEVANCY SCORE 56

Is it safe to change the ram frequency of my lenovo t420 i5 having ddr3, single channel ,FSB DRAm of 1:5 and my cpu is 2.50 GHz? It shows that it is running only with 664.MHz dram frequency. I am thinking if i can change it to 1600 MHz frequency...any help?
 

A:t420 lenovo windows 8 help?

DDR double-clocks, yours is running at 1333MHz.

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RELEVANCY SCORE 55.6

Hi,I am a newbie here and having  audio issues on my T420. A liitle background the notebook is running Windows 10 Pro 64 bit upgraded from Windows 7 Pro. The notebook was running fine until my Avast virus software falsely detected VBS Malware a couple of weeks ago.  Avast quarintined suspected files and deleted a bunch upon bootup. Since that time my audio stopped working. I see a red diagnoal X on the speaker symbol and it says, "The audio source is not running". I get an error message when I run troubleshoot. I went to device manager to uninstall and reinstall the audio drivers. I am unable to open Smart Audio in Control Panel.  Any suggestions or advice would be appreciated.  Also is it possible to still go back to Windows 7. If so and I can get my audio back I would not mind. Thanks in advance, 

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RELEVANCY SCORE 55.6

Hello, It seems I installed a wrong software and I can't now start my wondows.So for the timebeing the boot screen are rebeeting over and over without reaching windows.Thinkvantage button/ F11 doesn't work. I can only access the boot/setup menu Is there any way to restore my system without reinstall the windows again? Thanks.

A:Lenovo T420 startup issue

Try using the step provided below.http://windows.microsoft.com/en-MY/windows-vista/Using-Last-Known-Good-Configuration




*Non Lenovo employee*I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =)

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RELEVANCY SCORE 55.6

My laptop LCD has been out for awhile and I've been using with an external monitor, but I decided to fix the LCD so I ordered a new LCD screen for it. The lcd screen arrives, install it and picture still doesn't show up. I then thought maybe I just had a bad cable from motherboard to LCD so I replaced that.. still no luck.

I can see a faint image in the background, but it's very dark. Same with my original screen.

What's odd is before my original laptop would show a just scrambled picture of black and white-- which is why I originally thought it was LCD.

What would the next step be? To order a inverter? Do the symptoms above sound like it's a bad inverter?

A:Lenovo ThinkPad T420 Bad Inverter?

This may or may not answer your question.
How-to: Lenovo Laptop Dim LED Screen Backlight Fuse Repair

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RELEVANCY SCORE 55.6

Hello everyone I bought one LCD screen with the resolution 1366x768 for my Lenovo t420 but the back light don't work pleas can someone help me  ps: sorry for my bad English 

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RELEVANCY SCORE 55.6

Dear all,

I went through the different steps mentioned in "clean-up-factory-bloatware" article, apart from last point which consists of re-installing my machine! But still I have BSOD and it drives me crazy.

I attached the DM Log Collector results. Hope you'll be able to find what causes this.


Thanks for your help
Isma

A:[BSOD] Lenovo Thinkpad T420

Similar errors from NVIDIA,








  
Quote: Originally Posted by Arc


Though there are other issues, like some unnecessary nvidia services ...

Code:
BugCheck 7F, {8, 80050033, 406f8, fffff88004d5103f}

*** WARNING: Unable to verify timestamp for nvkflt.sys
*** ERROR: Module load completed but symbols could not be loaded for nvkflt.sys
Probably caused by : dxgmms1.sys ( dxgmms1!VidSchDdiNotifyInterruptWorker+ab )

Followup: MachineOwner
---------
....


You could try an older driver version.


Code:
Microsoft (R) Windows Debugger Version 6.2.9200.20512 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\admin\Downloads\LT-IT39-27_10_2014_134204_61\102714-6988-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*c:\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is:
Windows 7 Kernel Version 7601 (Service Pack 1) MP (4 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Machine Name:
Kernel base = 0xfffff800`02c4b000 PsLoadedModuleList = 0xfffff800`02e8e890
Debug session time: Mon Oct 27 17:10:16.177 2014 (UTC + 6:00)
System Uptime: 0 days 0:13:32.859
Loading Kernel Symbols
...............................................................
................................................................. Read more

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RELEVANCY SCORE 54.8

Hi, the speaker on my tasklist does show the speaker symbol with an red x. When I move over then I get the message that no audio device is installed. When I do a click on the speaker symbol the automatic problem analysis is started and I get the message that I haveto restart the computer. But it does not work Here are some observations : -when I shutdown the TP at the end of the process I here a beep. So the speakers work. - at some point in time in the past ( I do not know exactly when ) I have seen this speaker symbol with the red x. When I did the actions as mentioned above after a reboot the speaker worked well. When I did a restart again the speaker didn't work. I could do this for some time. Then this also didn't worked. - Then I have re installed the TP ( I have an upgrade from windows 7 -> windows 10). I used my initial windows 10 backup right after the upgrade. After the system backup had been installed I had the same speaker problems. Then the automatic windows update downloaded new files. When I restarted the TP after this process the speaker worked well again. When I restarted the TP again after a while the speaker didn't worked. Now I have given up and write these lines Any idea ?

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RELEVANCY SCORE 54.8

I just got a refurbished Lenovo PC-Thinkpad T420.  I think my 420 is stoned.  When I try to face chat (or whatever you call it) I can't hear them but they can hear me.  Where do I go on my device to check to see if something is wrong with receiving voice?       

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RELEVANCY SCORE 54.8

The free upgrade to win 10 pro failed several times.  I checked the web for problems and as a result uninstalled malwarebytes, antivirus, some drivers and some Lenovo stuff that popped up.  Finally the upgrade using the Media tool was successful.  Win 10 pro is now working on the T420.  However, only the Lenovo Companion is installed.  I bought a Yoga with Win10 pro and it came with Lenovo Companion, Settings and Account.  I have been trying to find a way on the Lenovo site to download the Settings and Account programs, but no luck.  Any suggestions?  (Probably a simple solution and I am just missing something obvious....)

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RELEVANCY SCORE 54.8

Hi guys, I just spilled a glass of water on m Lenovo T420 laptop. I immediately turned it off and kept it upside down for a while and haven't turned it on for 8 hours now. Is there something I should do to avoid damage? E.g. how long should I wait and  should I do something to dry it more? Help appreciated! Thanks,Joel

A:Water spillage on Lenovo T420 keyboard

Hi Lenoovoo,
 
Welcome to the Community Forums.
 
I would rather that you remove the battery and take it to a service center for general cleaning informing them of the immediate concern about the water spill. Do not attempt to power it on as tools may be needed to safely dry it up internally avoiding other issues.
How to Locate a Repair Center or Service Provider
 
If you have such skill and tools then you can use the hardware manual here a reference guide.
 
Hope this help answer your query.
 
Regards

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RELEVANCY SCORE 54.8

Hi have had this problem with the laptop since i got it. Have tried updating all drivers and the system bios, which has seemed to reduce the frequency of the freeze and shutdown, and searched for solutions on the net but I seem to be going round in circles. Please assist me in finding out what the problem is and how i could fix it. I have attached the necessary files.

A:Lenovo T420 random freeze and shutdown

Antivirus Software:
Code:
egui.exe c:\program files\eset\eset nod32 antivirus\egui.exe 6000 8 200 1380 3/2/2012 3:39 PM 4.2.71.2 2.12 MB (2,219,184 bytes) 1/12/2011 3:41 PM
ekrn.exe c:\program files\eset\eset nod32 antivirus\ekrn.exe 2508 8 200 1380 3/2/2012 3:38 PM 4.2.71.2 791.16 KB (810,144 bytes) 1/12/2011 3:41 PM
Your most recent .dmp files were from October. Make sure you have your system enabled for generating dump files. Dump Files - Configure Windows to Create on BSOD OPTION TWO part 2. will configure them properly. Also, avoid using any disk cleaning software (CCleaner, Windows Disk Cleanup, etc.) after a crash occurs.

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RELEVANCY SCORE 54.8

Hi all,i am new to this forum,i bought t420 last mounth from USA. Yesterday i spilled liquid on the clicks on touchpad. The right button works but it freezes sometimes, left doesnt work at all. Because i am in Europe now,the warnity does not cover.Do you have any idea how it can be fixed. Also the ultranav buttons dont work. With external mouse it works.Could you send me a link from a trackpad or some ideas.Thanks in forward.













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A:Touchpad buttons not working on lenovo t420

I guess the only thing to do is to take it apart and clean it;http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/0a60007.pdf 





_______________________________________________________T420s, i5-2520M @2.5, nVidia 4200m, 8GB DDR3, OCZ Vertex 3 Max IOPS 240GB SSD, Hitachi 320GB @7200rpm ulrabay, 8Pro x64T61, Centrino Duo @1.8, GM965, 4GB PC2-5300 DDR2 @667MHz, OCZ Agility 120GB SSD, 7Pro x64

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RELEVANCY SCORE 54.8

Lenovo T420, Type 4177-CTO. Windows 7 Pro, 64 bit.  8 GB RAM,  500 GB HD, third party 128 GB SSD added. After inspecting many laptops I chose the ThinkPad T420. The only better laptop was Apple and I needed different software. An important consideration for any computer is support. Lenovo has excellent support at 1-800-426-7378. Tech support and repair happens right here in the United States.  Repairs are done in Tennessee. The Lenovo ThinkPad T420 is a solid laptop. It is not as light as some laptops but strength and durability need to be considered. Weight of machine with a large 6 cell battery and a slice battery = 6 lb. 7 oz. (3060 kg). The laptop weighs 5 lb. 5 oz. (2430 kg) with just the large 6 cell battery. The 6 cell battery weighs 1 lb. 1.5 oz. (500kg) and the 6 cell battery would then weigh 1/3 less. You can compute the difference. Keep in mind my battery life with the slice battery installed is about 17 hours. The slice battery also places the laptop on a slight angle with the rear elevated. It is about the same tilt as with the docking station. You cannot have the slice battery installed while the laptop in in the docking station. The 6 cell battery sticks out the back so it is not a perfect cosmetic fit. The 4 cell battery will look nicer, be lighter and probably last about 4 hours. The overall design is perfect in my opinion. I find no problems. The T420 uses the LED night light that shines from the top of the display to ... Read more

A:Lenovo T420, Type 4177 Review

WOW!  Thanks for taking the time to write that up.  Lots of frequently-asked questions right here in this forum are answered in your review, plain-and-simple, easy for anyone to understand.

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RELEVANCY SCORE 54.8

Hi, I have a T420 running Windows 10 with LSC 3.2.002 injstalled. The Solution center does not show the system tab and hence I cannot do anything with it. Any suggestions? 

A:T420 Lenovo Solution Center 3.2.002 Not showing Sy...

Did you ever find a solution to this?   Not a good sign that they're ignoring your question.

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RELEVANCY SCORE 54.8

Hello, I rescently bought a lenovo t420 from a vendor thats not lenovo. It was find for a while, but then it got a malware virus. i did a removal of the malware. I then powered it on again but it displayed the thinkpad logo and the next screen was just black with a blinking underscore in the corner. I downloaded a diagnostic program to a usb and ran it. This is what the log says-> http://paste.ubuntu.com/p/P8H5BrGqmc/ Any help would be appreciated.

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RELEVANCY SCORE 54.8

Hi, I have Lenovo T420, my HD includes bad sectors, i'd like to replace it with a new one.My current HD should include win 7 installation files and lenovo recovery as it came from the factory.How can i make the same on the new one without copying from the old one? Thanks, 

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RELEVANCY SCORE 54.8

For updating my T420 in Lenovo support website, I installed the Lenovo Service Bridge. However, my security software detected it as a malware and deleted some files. Then every time the laptop starts, there will be a couple of pop-up windows (see lingks below), which is the same when I click the service bridge installation file. So I doubt that the service bridge is running somehow at the backstage. http://i.imgur.com/EBHdq8c.jpg http://i.imgur.com/P7t33ax.jpg When I clicked the detail button, a log file came out. PLATFORM VERSION INFO
Windows : 6.1.7601.65536 (Win32NT)
Common Language Runtime : 4.0.30319.34209
System.Deployment.dll : 4.0.30319.34244 built by: FX452RTMGDR
clr.dll : 4.0.30319.34209 built by: FX452RTMGDR
dfdll.dll : 4.0.30319.34244 built by: FX452RTMGDR
dfshim.dll : 4.0.41209.0 (Main.041209-0000)

SOURCES
Deployment url : https://download.lenovo.com/lsb/LSB.application
Server : Apache

IDENTITIES
Deployment Identity : LSB.application, Version=1.3.0.0, Culture=neutral, PublicKeyToken=91a10ba61c75c82d, processorArchitecture=msil

APPLICATION SUMMARY
* Installable application.

ERROR SUMMARY
Below is a summary of the errors, details of these errors are listed later in the log.
* Activation of https://download.lenovo.com/lsb/LSB.application resulted in exception. Following failure messages were detected:
+ Activation failed.
+ The system cannot find the file specified. (Exception from HRESULT: 0x80070002)
... Read more

A:Uninstall Lenovo Service Bridge on my T420?

Will any Lenovo support help me solve this issue?

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RELEVANCY SCORE 54.8

Hello, I've owned this Lenovo T420 for 8+ months. I have been receiving random BSODs monthly, starting a couple months back, before then, I dont remember having them ever. More recently it has become weekly. Some days there is more than one. Today I've had 6. A couple of them occurred randomly just browsing on Chrome. Twice after I was connected remotely to a clients VM software. Then a couple times just booting up.

Currently I am connected to another client via RDP, browsing, and haven't had any issues for past hour.

I've ran the dm logger tool instructions and am attaching zip to this thread.

The only virus scanner I use is malwarebytes free and don't have any active ones. I've disabled windows updates because I've had issues with them in the past on this laptop.

Thank you,

Scott

A:Lenovo T420 Random BSOD Occuring

Hi Daimyo21,

Welcome to the 7forums

If you have only Malwarebytes as protection, please install Microsoft Security Essentials
The software from Malwarebytes is NO Anti-Virus program and is not meant to run single on a system as AV.

Please install all updates from Windows Update available and check Lenovo for BIOS updates.

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RELEVANCY SCORE 54.8

Hi I am new to this community, so I would like to applogise if I mist a simillar subject (I did check some but non resolved my problem). I have a thinkpad t420, I bought a used one. It worked great, and I bought it from a friend, that I trust. I installed a ssd drive, was usnig Linux, and everything worked for one month. But then I bought a HDD caddy, and replaced the CD rom. After that my thinkpad worked for a day (although it didnt recognize the second HDD). The next day I tried searching BIOS for some settings, and after restarting my laptop it was stuck on Lenovo splash screen, rebooting in a loop. I tried:- removing and replacing the caddy with the CD rom,- replacing my SSD drive,- replacing RAM (both slots),- reseting BIOS,- running a diagnostic CD (but it will not boot, neither can I boot from an USB) My google search showed that it could bi a problem with one of the USB pins inside of one of the ports (short circuit or something like that), but I could not finde any damage. So I am thinkig that the motherboard could be damaged, but I can access BIOS, but that is the only thing I can do with it. I would be wery thenkful for any advice or help, before I go to an official Lenovo service for help. Thnak you! Z.













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A:T420 stuck on Lenovo splash screen

Hi Zjaz123456,
 
Welcome to Lenovo Community!
 
As per the query we understood that you are facing issue with not booting to OS on your ThinkPad T420.
Is both HDD &SSD detecting in BIOS?
 
Check with removing CMOS battery, make sure you have disconnected the system from AC adapter and battery is removed.
 
Remove both the drive & battery from the system, disconnect the power adapter. Press and hold the power button for 15 to 20 sec perform this step for 2 to 3 times and then connect only the drive which is having OS installed in it. Use only power adapter to switch ON the system.
 
Hope this helps. Do post us back for further assistance!
 
Best regards,
Hemanth Kumar





Did someone help you today? Press the star on the left to thank them with a Kudo!If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.Follow @LenovoForums on Twitter!

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RELEVANCY SCORE 54.4

Dear Community, a friend of mine has a problem. He upgraded the Laptop to Windows 10 for about 6 months ago. His Webcam is not found. There is no Imaging Device in the Device Manager and there is also no "Unknown Device" in it. The Driver for integrated Camera from lenovo site did not help. I used the Forum search but the entries did not help either. Anyone knows a solution? Greetings from Germany

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RELEVANCY SCORE 54.4

Hello!I just bought a Lenovo T420 without a WIFI -Card, Is there any way to remove this so i can use a 6235 Intel card instead of the 6205 which was in it originally?

A:Lenovo T420 remove BLACKLIST WIFI CARD??

Welcome to the Lenovo Community!
 
Actually, it's not a blacklist, but a whitelist.Anyway, I suggest flashing this modified BIOS version: https://www.sendspace.com/file/0whb9r
 
In addition to the removed whitelist, it has several other advantages over the original BIOS.
 

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RELEVANCY SCORE 54.4

I thought my problem was, mic not working; I finally saw in control panel "lenovo - microphone mute".I can see a need for mute. How can I disable this function. 

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RELEVANCY SCORE 53.6

 The audio was fine, until suddenly the tray icon was red x'd. Tried updating drivers- Windows Device Manager says 'no audio device installed'.  Uninstalled it, re-installed  from Lenovo Drivers.  Conextant 20672 Smart Audio HD, driver  8.32.44.  Still not recognized.  System Restore did Not fix it.  Researching brings no clear answers to  a cause or solution

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RELEVANCY SCORE 53.6

 The audio was fine, until suddenly the tray icon was red x'd. Tried updating drivers- Windows Device Manager says 'no audio device installed'.  Uninstalled it, re-installed  from Lenovo Drivers.  Conexant 20672 Smart Audio HD, driver  8.32.44.  Still not recognized.  System Restore did Not fix it.  Researching brings no clear answers to  a cause or solution

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RELEVANCY SCORE 53.6

The driver claims to be installed properly but there is no sound coming from the speakers or headphones, except, inexplicably, the beeping noise when you set it on the dock. The beep comes from the laptop speakers on undock and through my plugged-in desktop speakers on docking. I have uninstalled and reinstalled the driver manually, I have let Windows reinstall the driver on reboot, I have tried the alternative Dolby driver but nothing is working. It installs the driver, says it happened correctly, the on-screen volume overlay pops up when I use the volume controls, but there is no sound. The mixer shows all volume sliders at max, nothing muted, and of course I've tried toggling and untoggling all of them. muting system volume does mute the docking beep.  This just started out of the blue when I turned the machine on today. I've been using it for over a year without any issues. What do I do? how do I troubleshoot this? I tried the windows troubleshooter which was obviously no help. The Thinkpad T420 is a model 4177 QKU. Dock is a 433715 mini dock series 3. I've been using the Conexant audio driver for over a year without problems.  

A:T420 no sound from speakers or audio jack.

If you right click on the speaker icon in the lower right near the time, and select "playback devices", your speakers should be shown with a green check mark; and if you right click on the speakers, you should be given the option to test etc.      What happens when you do that, do you see the speakers set as default, and can you test and hear sounds successfully? 

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RELEVANCY SCORE 53.6

Hi, I have recently bought a thinkpad T420 and really like it but I have a problem with headphones not working at all :-( When I plug in the headphones nothing happens at all, audio still plays via speakers. I have tried to uninstall and install drivers for the audio, in Device manager under Sound current audio device driver is Conexant 20672 SmartAudio HD - unfortunately audio only plays via speakers. I have also updated other drivers to make sure it is all up to date, also updated bios.Under Sound tab in settings in the playback deviced only Speakers are listed, no headphone.... Don't know what else to do....? I bought this laptop especially for it being semi-portable so I can travel with it but having no headphone option ( on a train... ) may not be a good idea. Any solutions will be much appreciated.  Thanks, Pav

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RELEVANCY SCORE 53.6

Hello all, could someone have a look at my dmp files. Although windbg points in the direction of PCI.SYS causing the stop errors, my knowlegde is far from sufficient to take the next step. When the laptop goes into sleep or hibernation mode, it crashes. Pretty consistent. Problem was introduced after an huge automatic update but this is something I realesed myself later. Thank you!

A:BSOD pci.sys error everytime after sleep mode Lenovo T420

Welcome

The BSoD seems to be caused by the older drivers of your Intel(R) Wireless WiFi Link Adapter driver


Code:
0: kd> !irp fffffa800bc8b630
Irp is active with 4 stacks 2 is current (= 0xfffffa800bc8b748)
No Mdl: No System Buffer: Thread 00000000: Irp stack trace.
cmd flg cl Device File Completion-Context
[ 0, 0] 0 0 00000000 00000000 00000000-00000000

Args: 00000000 00000000 00000000 00000000
>[ 16, 2] 0 0 fffffa800a2ce050 00000000 00000000-00000000
Unable to load image \SystemRoot\system32\DRIVERS\NETwNs64.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for NETwNs64.sys
*** ERROR: Module load completed but symbols could not be loaded for NETwNs64.sys
\Driver\NETwNs64
Args: 00015500 00000000 00000005 00000003
[ 16, 2] 0 e1 fffffa800a027c70 00000000 fffff800038c8200-fffffa800b348ab0 Success Error Cancel pending
\Driver\vwifibus nt!PopSystemIrpCompletion
Args: 00015500 00000000 00000005 00000003
[ 0, 0] 0 0 00000000 00000000 00000000-fffffa800b348ab0

Args: 00000000 00000000 00000000 00000000
0: kd> lmvm NETwNs64
start end module name
fffff880`05cdc000 fffff880`0655e000 NETwNs64 T (no symbols)
Loaded symbol image file: NETwNs64.sys
Image path: \SystemRoot\system32\DRIVERS\NETwNs64.sys
Image name: NETwNs64.sys
Timestamp: Mon May 02 03:33:01 2011 (4DBDD18D)
CheckSum: 0083E... Read more

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RELEVANCY SCORE 53.2

Hello fellow thinkpad owners,
 
I have a new t420s (41717FU) core i7, 8GB RAM, and NVS 4200M discrete, win 7 64-bit pro.  I use the minidock with 2 external 28" displays on DVI out.  
 
I discovered major issues with latency with this machine; very noticeable loss of control for about half a second, plus annoying audio stutter, especially concurrent with network activity. This is quite frustrating, especially for a machine that is supposed to be high end core i7 with discrete graphics. I had a t410s previously and also had latency problems, and I know this is a real problem with several different models (just search 'annoying audio') on the forums.
 
I have used dpc latency checker as well as latency mon and narrowed the probable culprit to the network drivers associated with the gigabit ethernet.  It took me a while to discover the relationship to the Intel 82579LM, since LatencyMon will identify the problem with NDIS.sys or NETIO.sys, giving sporadic latencies over 20000 microsecs, which made me think it was a Win 7 tcp stack issue or maybe some internal windows firewall blocking.  During these spikes, the audio stutters, the mouse won't move, everything on the system just stalls for a split second.  Temps on CPU seem within normal limits at about 70-80C.  I've read everything I could find about this issue, including problems with NVIDIA drivers, ACPI, firewall/antivirus, etc etc, and tried most of those suggestions. &n... Read more

A:DPC latency + audio/mouse skip and stutter on t420...

I (and many other owners of T420, 520, etc - see other posts if you doubt it) have *no* latency after installing this older driver from HP. But as soon as I install the Lenovo-provided driver 11.12.38.* or any later one from Microsoft or the Intel generic driver (intel no longer publishes the old driver), I see *immediate* problems with latency, mouse and audio stutter. But use the driver published by HP (specifically version 11.12.36.0, published 5/4/2011) -- Problem solved!  I tested with streaming and browsing for several hours and no spiking or stutter.
 
Here's where to get the english language download from HP:  >> DRIVER DOWNLOAD PAGE HERE <<
 
Lenovo, PLEASE: this is strong evidence of a faulty driver for those of us with a t420s (and other thinkpad users out there using the intel 82579LM chip under x64).  I encourage you to review this solution and engineer an update for the Intel gigabit adapter, or at minimum, roll back to the older driver or some Lenovo approved derivative so it doesn't cause all of us notebook users such a major headache.  It's very bizarre that we would need to go to another manufacturer to get a working driver...I was ready to return the machine over this issue! 
 
Aside from that adapter problem, I've been pleased with the t420s performance and features.  Thanks again lopiuh for this workaround.  
 
Mojojojo in Austin TX
 
ADMIN EDIT - Lenovo is testing a beta et... Read more

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RELEVANCY SCORE 53.2

Lenovo T420 missing INtegrated Camera, cant be detected by any 3rd party app (ie. bandicam) -I already installed the latest drivers but nothing happen (see pic file below) -already checked the BIOS and the camera is enabled but still no camera was detected -I tried troubleshooting but no luck -Tried going to settings fn+f6 but there is no camera settings there?(see pic below) -Checked device managaer suprisingly,also missing (see pic below) -I tried to add legacy hardware, but there are no integrated camera. Please hlep....... getting headaches for weeks because of this........ thanks in advance


























2017-06-13_18-42-46.png ?316 KB

A:Lenovo T420 Integrated Camera is Missing!!! HELP I TRIED ALOT OF SOLUTIONS BUT NOTHING WORKED

Hello and welcomeTo make sure the web camera is preinstalled in the laptop, provide, please, its Machine-Type-Model code, begins with 4177, 4178, 4180, 4236.

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RELEVANCY SCORE 52.8

I just purchased an adapter plug that allows me to connect my Lenovo/IBM thinkpad (T420) to my HDTV by plugging the HDMI cord into my TV and the other end to this adapter plug which converts the HDMI cable into a male plug which fits into my display port (there is no HDMI port on this model computer). It worked, but now I can't remove the adapter plug...it's stuck in the laptop display port. I do not know if the problem is caused by the male adapter plug or the female jack in the computer, but they're locked together now.

I have previously read review comments (on these HDMI/display port adapter plugs) mentioning this jamming happening on more than a couple occasions, but I don't recall any resolutions being mentioned except to break off (and destroy) the plug and possibly damage the display port as well. I called Lenovo tech support but they said I'd have to mail the computer to them to get it fixed. I'd prefer avoiding that if possible even though my warranty is still in effect and it would be of no cost to me.....just time lost without a computer.

I'd greatly appreciate hearing from anyone who may be aware of how to resolve this problem (and also how to avoid it happening again) without doing damage to either the plug or especially the computer display port.

Thanks for your consideration in any case....
 

A:Solved: HDMI adapter plug stuck in Lenovo T420 display port

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RELEVANCY SCORE 52

My pc was running well and I decided to reinstall windows but this time I have problem...I have windows 10 and my laptop is Lenovo Thinkpad T420  My power plan minimum and maximum processor state are both set to 100% and for some reason i can't change them, they are like stuck to 100%. Even when I try to restore my settings to default the maximum and minumum processor state will still remain at 100%. I want to change my minimum processor state to 5% and maximum to 80%. I did it everytime after reinstalling windows and this time it just don't work. My laptop is overheating a lot while I'm playing games or just watching videos. I already tried to reinstall windows for one more time and first thing I did was changing maximum processor state in power options but it didn't let me type other number except 100%.  To be more clear what is my problem, here is recording of it: Please help, much appreciate, Thank You!

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RELEVANCY SCORE 52

Having shutdown problem with Lenovo T420 Notebook. Lenovo T420 default come with OEM Windows 7 Pro and we upgrade it to windows 7 Ent After upgrade, join domain, install bitlocker and perform windows update. Normally user sometime won't shutdown their
notebook on 2-3days because they using it on production environment. when try to shutdown windows 7 after 2-3days, it can shutdown windows 7 and LCD screen blank but the notebook power indicator light still on. I need to press the power button for few second
to power off the notebook. Any solution to solve? Called to Lenovo they request me to just get the patch from Microsoft, Lenovo support did not give me what is the patch i need to install. Any one having this experience? Already do the fresh installation of
the windows but the problem still remain on many unit of our T420 Notebook

A:Windows 7 Enterprise on Lenovo T420 Shutdown Issue (can suhutdown system but can not power off notebook)

Have you tried to update the BIOS yet?  If not, that would be a good place to start.  You can also try pulling the battery out while having the laptop plugged in and see if you get the same results.  If so please let us know.

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RELEVANCY SCORE 45.2

Lenovo Gen 4(20FC) Carbon loses audio after Lenovo System Update We have several of the Gen 4 X1 Carbons here at work and they work fine until Lenovo system updates gets run. We have had 4 people run the system updates and now the system has no audio. If you click the audio icon in the try, windows begins diagnosing the system. If you try to install a different driver, it fails with code 1. No matter if you uninstall, reinstall, different versions of the driver....nothing seems to restore the audio. I finally did a system restore to before lenovo system update was run and the audio returned to working. It seems to be a software problem but I would really like to know if there is some way to get it working without having to restore every time someone runs lenovo system update. 

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RELEVANCY SCORE 45.2

I just bought a notebook Lenovo G450 and I had drivers not found problem. My OS is Windows XP SP2. In Device Manager, there are four "Audio Device on High Definition Audio Bus" device with exclamation mark. Below is the link to the screenshot of my device manager (pardon me, you have copy-paste the link manually since my post count is still below 5 so I cannot post link/image here):

There is no sound problem since I had successfully installed the sound driver from lenovo (The name is "Conexant High Definition SmartAudio 221" as you can see on the screenshot above) and the sound is working without problem. I also had installed Microsoft UAA Bus Driver before installing the sound driver.

I had tried installing realtek and nvidia high definition audio driver and all required drivers from lenovo (http://consumersupport.lenovo.com/en/DriversDownloads/drivers_list.aspx?CategoryID=370748), but still no avail. The four yellow exclamation marks is still exist.

So I need help to identify what actually are the devices that shown as "Audio Device on High Definition Audio Bus"? And where can I get the driver for that devices?

These are the device IDs:

Code:
HDAUDIO\FUNC_01&VEN_10DE&DEV_000B&SUBSYS_10DE0101&REV_1001\5&15CAAF27&0&0001
HDAUDIO\FUNC_01&VEN_10DE&DEV_000B&SUBSYS_10DE0101&REV_1001\5&15CAAF27&0&0101
HDAUDIO\FUNC_01&VEN_10DE&DEV_000B&SUBSYS_10DE0101&REV_1001\5&15CA... Read more

A:Audio Device on High Definition Audio Bus driver not found on Lenovo G450

I'd advise you should first upgrade to SP3. Then report back if you still have the problem and can proceed from there
 

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RELEVANCY SCORE 45.2

On my lenovo T61 I just installed windows xp and there are quite a few drivers missing that i am looking for. I found what I thought was the solution to the audio problem here: http://www-307.ibm.com/pc/support/si...cid=MIGR-67816
but it didn't seem to work. Since I don't have internet on the computer i just switched to xp, I downloaded what was on that website onto a usb drive and then installed it on the computer I'm trying to fix. It still says that I am missing the "audio device on high definition audio bus". Shouldn't the file at the above link take care of the problem? Anyone know where I could find the driver I need?

A:audio device on high definition audio bus missing for xp pro on lenovo t61 pc

bad thing about IBM's website is they sometimes post more than one driver. Look through the list to see if there are anymore audio drivers for Xp listed.

I could look, but IBM's site needs the unit type in order to look for drivers/manuals. 4 diget number on the white sticker on bottom of the laptop. for example

- ThinkPad R61(type):
- 7732, 7733, 7735, 7736, 7737, 7738, 7742
- 7743, 7751, 7753, 7754, 7755
- 8914, 8918, 8919, 8920, 8927, 8928, 8929
- 8942, 8943, 8944, 8945, 8947, 8948, 8949

those are laptop types that IBM uses, am sure you noticed that on the page you linked :)

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RELEVANCY SCORE 45.2

Hi Team, While Iam playing some audio /video on you tube and working on some other thing in another browser and if there is any load on that browser , or working on any documents  /office work or some captcha verification in progress the audio which is already running gets stuck or drags for 5 secs  with blurred audio on youtube. Any idea? Its been a month exactly tomorrow that I got YOGA 710. Sometimes if youtube is the only thing which is running on my laptop   

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RELEVANCY SCORE 44.8

This happened today: I was watching a TV show on my computer and the sound was ok.I unplugged my headphones and the audio symbol in the taskbar had a cross.It said "no audio output device is installed".No audio would come out of the PC.Apparently, the audio drivers were uninstalled, probably by some Windows 10 update. I downloaded the drivers from Lenovo's site and, when I installed them, the sound quality was awful and sound would take exactly 6 seconds after I hit play on Spotify or YouTube for the sound to actually come out, ie, I'd miss the first 6 seconds.I called support and they uninstalled the drivers and proceeded to do what I had done before: download the drivers again and re-install them.The audio quality improved but the 6 seconds with no audio remained and here I am now. Since they couldn't find the solution and told me to to a factory reset. But I'm looking into an alternate solution before factory resetting the laptop. Dows anyone have an idea of what could be wrong?

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RELEVANCY SCORE 44.8

I have a Lenovo G510 running Windows 10, upgraded from 8.1 long ago.  I'm not sure if there was a recent update that caused this problem, but one evening everythings was fine, and I know because I fell asleep with the "Simply noise" website playing white noise, and when I woke up, there was no sound.  I tried all the normal fixes (reinstalled drivers in device manager, downloaded latest drivers directly from Lenovo website and tried them, restarted Audio Endpoint and Audiosrv in taskmanager, even went into regedit and checked that the value for the audio endpoint was correct, but made no registry changes) all to no avail.I was beginning to think that there was a wiring problem and was getting ready to open it up and look around, but decided to try something else first.  I put in my ubuntu live cd and restarted without installing ubuntu.  All audio works in Ubuntu. Speakers, headphone and mic jacks, and I even tried my usb>headphones/mic adapter and everything works.  I'm planning to dualboot ubuntu while waiting to find a fix in windows, but I've never had a dedicated Linux machine so I'd like to still be able to turn to Windows since I'm about to go back to school in a few weeks.Please let me know if there's a fix out there for this that I haven't tried, or if I need to post more information to check for other problems that may have caused this.  Thanks in advance! -Tronk

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RELEVANCY SCORE 38.8

I have had my lenovo for about a year and a half but issues arised 1 day after my warranty expired, very convenient. I have just now found out about a forum.  My audio works fine when on a hardtop table, however audio goes away once tilted forward slightly on a pillow or on a softer base below it resulting in the audio from my videos/music being replaced by a clicking noise. Not sure if this is a hardware of software issue.  HELP PLEASE 

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RELEVANCY SCORE 38.8

I have had no audio since I bought this unit a few weeks ago. There is a red x by the audio symbol and the error "no audio output device installed". I have tried to troubleshoot, uninstall and reinstall Realtek, update the drivers, complete a system restore (as some googling suggested it was a windows update) but the restore keeps failing as it is supposedly being blocked by the antivirus even when I disable Windows Defender. Nothing has worked. Any assistance would be much appreciated. 

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RELEVANCY SCORE 38.8

Hi, I have a G70 running Windows 10. Is it possible to records stereo audio from the side jack?I didn't find anything in this forum. No audio drivers updates.

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