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Lenovo t420 backlight don't work

Q: Lenovo t420 backlight don't work

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 200
Preferred Solution: Lenovo t420 backlight don't work

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 68.4

Hi, I have just Recived a YOGA 710. From first time Keyboard backlight does not work. I have try to reinstall power mangement interface from Lenovo.com, energy setting, and energy saving, reinstall mouse and keyboard drivers...Factory reset, and enable/disable Hot keys neither works.Bur cap lock key has backlight, space bar  and Fn Keys work fine.And of course space bar has backlight symbol. Any idea?

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RELEVANCY SCORE 67.6

First it was cracks on the lid, then there was a stuck battery latch, then it stopped booting, and now there is no screen backlight. Oh Lenovo, what have you been doing to the beloved Thinkpad brand? :-( It works with an external display, but that is not really the point of a laptop computer. I have seen this thread ("T420 no backlight bad fuse?") here and this thread ("T420s with broken backlight - replace the whole panel?") in thinkpad.com forums and I am somewhat confused as on how to proceed from here.  I would like to avoid an expensive repair if this is something I could fix myself.  I am not entirely sure it is a blown fuse issue, because the no backlight problem occured a few times (it would not work sometimes on boot, sometimes it would) before it the backlight stopped working entirely.  It possibly is a loose contact somewhere.  Hopefully.  I suppose the hardware manual could help, but I am not sure what is it that I should look for. Would you folks have any advice for me?













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RELEVANCY SCORE 56.4

Hello.I just buy Lenovo y700. After 3 days of use I have a problem with red light from keyboard. Each time when I turn on laptop e little portion from keyboard (space bar, M,N,K,L,I keys) start to blink. I made a video with issue to see what happend. After 4-5 minute light remain at full brightness.https://youtu.be/FoqEe4pzBnwFor future can be a big problem? , I should ask for repairing ? Or maybe I can solve by myself. Another think. I want to control my fans, battery mode, and other settings, I try to download from lenovo software Quick Optimizer Windows 10, Lenovo Utility for windows 10, and no software are working, First I thought my windows it s broken, do fresh install windows 10 PRO, try to install there software but no solution. I install software, no shortcut its created on desktop, if I search for program in Program Files, and try to run .exe, this is not appear, it s like a fake link, nothing run on my desktop. Try to run in admin mode and nothing, try to reinstall and nothing, whatever I do these program are not working. I had lenovo z51-70 and I use with succes software from lenovo to clean fans, to put battery in conservativ mode. And I have same windows kit. With lenovo y700 no software it s working on this machine. Sorry for my bad english, if someone need more information, ask me.Thanks in advance for help.

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RELEVANCY SCORE 55.6

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 55.6

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 55.6

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 55.6

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 55.6

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 54.8

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 54.8

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 54.8

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 54.4

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 54.4

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





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RELEVANCY SCORE 54.4

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 54.4

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 54.4

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 54.4

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 54.4

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 54.4

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 54.4

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 54.4

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 54.4

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 54.4

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 53.6

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 53.6

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 53.6

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 53.2

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 52.8

HiI have tried several times, burnt two cds and it does not work. I use a linux OS therefore i dont use the windows .exe installer. I think the iso "83uj33us.iso" containing bios 1.52 (latest)may be corrupt... as i have downloaded it several times and tried several things:1/to create a usb bootable pendrive with the .img (geteltorito extractor) (maybe 4 times)2/burn a cd with the above mlentionned iso (twice)and the result is the same: F12 => choose usb or burnt cd with latest bios ver 1.52 on it and it just doesn't boot at all and gets back to the F12 menu. I've already flashed many motherboards and it's the first time i can't do it... Anyone have the clue or faces the same issue? Franck

A:T420 bios update via cdrom does not work

Welcome to the CommunityIs either the USB stick or CD with BIOS update image written, being connected to the laptop, recognized in the BIOS Setup Boot menu?

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RELEVANCY SCORE 52.4

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

My Thinkpad T420 turns to a sleeping mode after 1 minute of inactivity on any power plan. It ignores timer settings (sleep after 30 minutes in the Balanced mode and Never sleep in the High performance mode). I hoped that Lenovo Settings software would help resolve the problem but nothing changed after I installed it two days ago. Is there a solution to this?P.S. I have most recent drivers and BIOS installed.

A:Power timer settings do not work on T420 under Windows 8

Am I the only person with such a problem?...

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RELEVANCY SCORE 52

Hi All, I?ve recently bought a new T420 Thinkpad and I?m having a similar problem to that reported by others here, namely that my wireless internet keeps disconnecting and reconnecting every minute or so.  This is a problem because it interrupts whatever application I am using (such as Word or email) so it stops working for a few seconds.  In fact it?s making the Thinkpad virtually unusable, as the only way I can type in Word is to use the physical ?wireless off? switch. I have tried the remedies already published here but they either don?t work or refer to options I don?t have on my machine. Things I have tried:-      1.  ?Launch ThinkVantage Power Manager -> Switch to Advanced Mode ->Click Advanced Settings -> Scroll down and           set ?Maximum Performance? in ?Wireless Adapter  Settings? -> press OK.? But on my T420 in ThinkVantage Power Manager, under Advanced Settings, there is no option setting Maximum Power or any other  ?Wireless Adapter Setting?.      2.  ?Go to Device Manager, select your Wifi card -> go to Properties ? and set ?Transmit Power? to maximum, and          ?Roaming aggressiveness? to lowest setting.? I have done this for my Intel(R) Centrino(R) Advanced-N 6205, but with no effect on the problem.... Read more

A:My T420 Thinkpad keeps switching wireless on and off (and the remedies given here don't work)

Hi Richard, Please try to update/reinstall wifi driver. If problem persist, please contact local lenovo for hardware checkFred





T61 + X201i

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RELEVANCY SCORE 52

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 51.6

Hi, I've been using my P50 for a little over a year now and recently, the display has been acting up. The back light only lights the centre of the screen, with a dark patch on either side most noteably in the bottom corners. Also, the screen has started displaying the wrong colours, so that images look like negatives. Is this just a faulty connector? Or is it two separate issues. Should I get the screen replaced or can i just unplug the back light and plug it back in? Cheers in advance!

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RELEVANCY SCORE 51.6

There is no display coming out of the screen however if i shine a light from behind the screen or connect to an external source, it works normaly (its a brand new screen). I was thinking the problem might be with the inverter. Not really sure what to do. Thanks in adavance

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RELEVANCY SCORE 51.6

On my 6 month old Lenovo G50 yesterday, the screen went completely black. I turned my laptop off and on again and as I was turning it off it displayed 'Please Wait' like normal. When it came back on I could faintly see the 'Lenovo' launch logo. When it would usually ask me to sign in, I had to shine my phone torch at the screen to see the image.I looked it up on a forum and one user suggested tapping on the back of my laptop to see if the screen would come back on and it did. The backlight turns off whenever the hinge is moved but can always be 'fixed' by almost bending the display towards me.  This is the second problem I have had with this type of laptop as my first one that I got at Christmas wouldn't even boot up so we had to return it. Is there any easy fix?  It's also still under warranty but I don't have time to send it away as I am a college student who requires it for work and I will also shortly be using it to make a promotional video for a company. 

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RELEVANCY SCORE 51.6

So today I noticed some flickering on my laptop's monitor, I restarted the computer and the backlight on the monitor is acting strange. It appears like half of the backlights are on while the other half are out, causing this weird pattern of columns of bright sections of the screen followed by dark sections. When the laptop is unplugged, the backlight doesn't work at all making the screen impossible to see, also changing the brightness setting while it is plugged in has no effect on the lights. Please help.

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RELEVANCY SCORE 51.6

Click here to view image
 
Does it normal? it's 4K Screen
 
 
 
Mod's Edit: Image(s) converted to link(s) due to size.  Photos are limited to 100k size per forum guidelines.                     Please refer to About Posting Pictures for more information.

A:Backlight bleeding on Lenovo Y50-70

Mine is a Y50-70(2015 model, 256SSD) with FHD, and the left corners and the down right one prezent blacklight bleeding wich is pretty anyong considering that i've bought it on 12.12.2015. Is this normal, considering the price of this notebook ?

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RELEVANCY SCORE 51.6

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 51.6

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 51.2

Hello, this is my first post here! I just bought a Lenovo Y700 today, and I'm very impressed with it so far. However there's just one thing bothering me: backlight bleeding. I've never owned anything with an IPS display before, so I'm not sure if this is normal or not. Could you please tell me if this is acceptable or not? Does it get worse with time or stay the same? I read that it's normal for IPS displays to an extent. Is that true?Here are some pics: http://imgur.com/a/rAHFvThe one on the bottom worries me a bit.Thanks in advance!










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A:Lenovo y700 backlight bleed

Hi Interlope,
 
Welcome to the Community Forums,
I was not able to open http://imgur.com/a/rAHFvSeems your issue might be similar to this thread . Check on the image provded .On the sample image glow seems to appear on different angles too.
 - Link to images
 - Link to images
"IPS glow should only be apparent at extreme viewing angles in very dark images or black screens. If it is visible from head on and always in the same spots, it's not IPS glow, it's backlight bleed " .
In normal IPS display, such glow usually is mimimal and be lesser than an inch.
Else call in tech support for repair especially if return is not an option.
 
Hope this helped you in your decision. 
 
 
Regards

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RELEVANCY SCORE 51.2

Greetings everyone! I have recently upgraded my Windows 10 OS to the anniversary update recently and shortly after the update, my laptop's LCD backlight randomly went off and wouldn't go on. At first I thought it could be the drivers update that messed up the backlight but I knew it doesn't work that way. Here are the list of things I've tried: - Rebooting (obviously)- Reinstalled the Intel HD graphics card with the latest version from Lenovo's support- Reinstalled the Nvidia graphics card with the latest version from Lenovo's support- Also tried previous Intel & Nvidia graphics card driver versions- Keyboard's built-in backlight controller doesn't do anything I'm starting to think it's hardware related issue and if that's the case, where's the trusted website to obtain a LCD screen replacement to fix it myself (I've already found tutorials on how to replace it, because warranty expired literally last week...) Thanks!!!

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RELEVANCY SCORE 51.2

laptop works fine when plugged in but screen turns off when unplugged. Cannot see anything without shinning a flashlight on the screen.

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RELEVANCY SCORE 51.2

Hi, I have a y700 ideapad laptop.My problem is with backlight bleeding.Can I have any chances with this at warranty?Thanks!


























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RELEVANCY SCORE 51.2

Hi, want to know if there is backlight keyboard in ideapad 310 i7 7th gen? If there is then i cannot find how to turn it on. Kindly let me know, thank you!

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