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Lenovo ThinkPad T420 Bad Inverter?

Q: Lenovo ThinkPad T420 Bad Inverter?

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?

RELEVANCY SCORE 200
Preferred Solution: Lenovo ThinkPad T420 Bad Inverter?

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.)

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 79.2

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 74.4

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 62.4

Had a customer call me with an IBM G40 laptop with issues.

Faintly see the graphics on the LCD screen and no back-lighting. I popped the trim on the LCD and checked voltage out of the inverter, nothing. I did notice that the LCD will light for just about 1 second when power is 1st applied to the inverter so that rules out a bad panel.

Has anyone ran across such symptoms on LCD inverters? I guess I can swap out a $26 inverter & see if it cures the problem.

Thanks
 

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RELEVANCY SCORE 62.4

I can't find anything that looks similar or even a part online ( troubleshooting ).Is it built in to the LCD screen itself or is it on the laptop like most are?













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A:Where is the LCD Inverter for the Thinkpad T450s?

CalebNelson wrote:
I can't find anything that looks similar or even a part online ( troubleshooting ).
Is it built in to the LCD screen itself or is it on the laptop like most are?

 
Good day.
 
I believe the panel is LED-lit, therefore no inverter. There is no mention of an inverter that I can find in the HMM, either: https://download.lenovo.com/pccbbs/mobiles_pdf/t450s_hmm_en_sp40g54937_01.pdf
 
Regards.

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RELEVANCY SCORE 62

A while back, user "raybay" posted some guidance on replacing the backlight and/or inverter on an ibm thinkpad r51 notebook. Here is a quote:

Inverter.
That is a very high price for an inverter for an R51, but the R51 is a very rare computer... so you may have to pay it.
you need a very good quality #1 hard steel philips screw driver, great care in removing and replacing the screw covers, and the time it takes to remove and replace 18 screws. But the inverter just plugs in. Mark all your screws as you remove them as they are not all the same length or diameter. But the most important function is removing the screw hole covers so you can use them again. You will benefit from a very, very thin flat blade screw driver or other tool to lift the screw covers out and off. You will need a nice adhesive that remains soft when you replace them.
It is very rare for an inverter to go out in that model.​
What I'm wondering is, this sounds like instructions for replacing just the inverter, but what if my problem is with my backlight as well (or instead)? Apparently they can also be replaced, but I've read suggestions that this may involve soldering. If you are lurking, raybay, do you know specifically what is required to replace the backlight on this model?
 

A:Replacing backlight/inverter on thinkpad r51

You can get the inverter, new, on eBay for $9.95 on up to $20... DO NOT BUY A USED ONE, and DO NOT BUY ONE FOR A SLIGHTLY DIFFERENT MODEL. It is the screen that determines the model number... and that inverter/backlight is part of that particular model number.
Your inverter and your backlight are basically the same thing the failure of one affects the other... or they are in the same device depending on the laptop.
None of the IBM Lenovo units need soldering... but you have to remove about 20 screws, and remove the rubberized screw covers... so making it pretty again when you are done is the hard part... as you have to learn how to reapply the screw covers and the rubberized stickum.
USE VERY GOOD, VERY TOUGH TOOLS. DO NOT USE TOOLS that wear easily. Cheap toosl will mar the screws and ruin stuff.
First you buy the backlight.
Second, remove the keyboard.
Third, you remove the screw covers with a very thin device like a 1/2 or #1 flat screw driver, only with thinner metal... and some tweezers to lift off and store the screw covers which are mostly very thin, round flat rubber disks.
You need some soft of bowl or series of cups where you can put the different size screws. You need to keep a chart of which size screws come from where... Unless you have a good mind for those sorts of things and nobody does.
You may find it easier to remove the back of the computer where the screen is kept... and CAREFULLY remove the ribbon cable for the screen that plugs in beneath the keybo... Read more

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RELEVANCY SCORE 61.2

I have an IBM Thinkpad T42. The screen does very dark while booting up, even has a pink hue at times, then goes very dark. You can faintly see the screen. If I move around the contact switch at the upper left corner of the keyboard, the screen will light up but will not stay. I replaced the inverter last night and it worked fined. I turned the computer off. This morning, when I attempt to turn on, back to the same problem again. If i wiggle the contact button, it lights up but will not stay on.

Can you tell me what the problem?

Thanks
 

A:IBM Thinkpad T42 Black screen - replaced inverter

Will someone look at my post and help me???

Please... Thanks in advance
 

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RELEVANCY SCORE 60.4

Hi,
Over the past year, since I upgraded the memory on my IBM R31 Thinkpad, I have had intermittent problems with my screen blacking out. It's not completely gone, just extremely dim, but I can make out the things on screen by using a torch. At first, I was able to trigger it back by leaving the lid open and never closing it, taking all the usbs and plugs out of the back, or re-starting it.

However, it seems like nothing I do will trigger it on now. I've done a search and apparently the commonest cause is that the inverter needs replacing. Would this seem like a sensible thing to buy?

http://cgi.ebay.co.uk/IBM-Thinkpad-...goryZ162QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

The only thing I'm thinking now is, i've had this laptop for 5 years now!! I'm not sure if it's worth fixing or upgrading anymore. I mean, I love it, just cos it's lasted this long, i've upgraded the memory from 128mb to 384mb and i've bought a wireless card for it but would it be worth trying to buy and fix myself a new inverter or just buy a new laptop?

Thanks!!
 

A:IBM Thinkpad - Backlight screen black.. inverter replacement?

Well the most common things would be the inverter board you linked to, or the backlight bulb itself.

If the laptop still suits your needs, in terms of performance than its much cheaper to just fix this one, than buy another laptop of similar quality.

The great think about IBM is the great support. Here is a link to the hardware manual for the R30 model.
http://www-307.ibm.com/pc/support/site.wss/MIGR-39797.html
It should tell you how to get at the inverter and bulb.

Even if you do get a new laptop, its still worth it to fix this one up as a backup laptop. 20-30 pounds and a couple hours to fix it isn't that bad.

And i believe its called a flashlight not a torch. You could burn the house down with a torch
 

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RELEVANCY SCORE 60.4

Has anyone found a way to successfully install intel wi-di on a t420 or t430 running windows 10? I have tried many driver combinations without success. From what I have read it seems that these machines used intel?s proprietary tech for wireless displays where the current gen is just miracast rebranded. Its seems intel is no longer developing for new operating systems for 4-year-old hardware.

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RELEVANCY SCORE 60.4

Our elderly uncle forgot his password and after some effort to reset the password the Thinkpad (Type 4236) now won't even start the software. The photo shows what we see after turning on. I have tried all the function keys and Thinkvantage, and I read the support site but haven't found a solution. I did read something that suggested trying to change a particular password could close the harddrive.view on turn onfull screen Can anyone say what it was that caused this and how we might fix it and renew his password. Thanks.

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RELEVANCY SCORE 60.4

My T420 did not come with Bluetooth, so I bought a daughter card but it still does not work.  Can't install the drivers because it says there isn't any Bluetooth hardware installed.  Bluetooth is enabled in the BIOS. Is there some othet piece of hardware I need to purchase and install?

A:ThinkPad T420 Bluetooth

HiI hope laptop hardware wireless devices switch is turned on.What BT card did you bought (p/n, FRU)? What (and where from) drivers did you install?

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RELEVANCY SCORE 59.6

Can you tell me what's error and how to fix it. I only see this error on windows 7 (

























DSC_0074.JPG ?2757 KB

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RELEVANCY SCORE 59.6

My T420 recently started malfunctioning, certain keys type more than one character. For example pressing the 'V' key types 'vg'. Does anyone know the cause of this issue? Thanks in advance.

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RELEVANCY SCORE 59.6

After pressing power button, charge light blinks 3 times, stops for 1 second, blinks one more time, then  nothing.I have replaced the battery and charger, with the same results.

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RELEVANCY SCORE 59.6

I upgraded to Win 10 via Windows update.  All went well, everything worked fine, but I did later find out that Lenovo isn't supporting T420 with driver updates for Win 10.  While Windows 10 was still installed, I looked at the driver support page for the T420, Win 10 is not listed as an option in the drop down of OSs.  Accepting this, and not wanting to run into problems later down the road with future Win 10 updates, I rolled back to Win 7Pro.  Now I don't think I have a straight answer on whether the T420 actually is supported under Win 10 or not.  The first thing I did after rolling back was to go to the Lenovo driver support page.  Now it shows windows 10 in the drop down as a supported OS.  What's up with that?  I've looked in the forums and elswhere online and every indication is that the T320 is not officually supported.  Lenovo does not list it as supported.  But yet now Windows 10 drivers are listed for the T420, but only when I'm running Windows 7Pro, not when I'm running Windows 10.  I'm assuming that the website is autodetecting my current OS.  I can't make heads or tails of it.  I'd like to go back to Windows 10, but given the confilcing info from Lenovo...Anyone have any suggestions.

A:ThinkPad T420 and Windows 10 support

While there are some Windows 10 drivers available now for your T420, many are still missing, so I would wait until it is listed as upgradeable by Lenovo, and thus all the needed drivers are released, or risk having issues.   Until then, I would stick to 7pro...  Lenovo supported systems list for Windows 10 Upgrade (Last Updated :01 Apr 2016)https://support.lenovo.com/us/en/documents/ht103535#thinkpad Lenovo Windows 10 devices tested for November Update / Version 1511 (Last Updated :01 Apr 2016)https://support.lenovo.com/us/en/documents/ht104857#tp 

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RELEVANCY SCORE 59.6

I just bought a refurbished ThinkPad T420. A friend of mine said it had a good spec so I was looking forward to having a play around. Right from the minute I switched it on there was a problem. The touchpad and mouse are not working. The only way to use the mouse is via the track point (is that the right term?) and I hate it! It's way too fiddly. So I tried fn and F8... it doesn't work. I've tried rebooting and enabling the touchpad in the BIOS it doesn't work. I've deleted drivers. Still nothing. I've installed new drivers. Many tutorials say you can fix it using device manager, mouse etc. But the tab the recommend you choose is not there. I installed new drivers from synaptics and it says there is no synsptics device found. I am honestly going insane! Something that should be so simple and it's so awkward! Forgive me because I'm half asleep but I should mention when I first tried to fix it the tab in mouse properties that everyone says I should use (ultra something) well it was there. But when I tried to click any of the options on that tab I was kicked out and got an error messsge. Now that tab no longer appears. It's running on windows 10. I'm ready for launching it out the window. Help!

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RELEVANCY SCORE 59.6

Hello guys.My T420 restarts on his own here and there showing this blue screen (please see attached file). Do you know what could be the problem? ?Regards Tomas?

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RELEVANCY SCORE 59.6

Hy!I've used my Thinkpad T420 battery charge mode with custom settings: Start charging when below 95% and Stop charging at 99%. Because the battery effectively has never charged full, it cause sudden capacity decreases (for example from 30% discharging to 7%). I got bored to this and changed to automatically optimize battery lifespan. I noticed that every full charge the "Full charge capacity" value decreases. I have charged it 5 times after this settings, and the remaining capacity looks like this: 57.10Wh, 57.05Wh, 57.00Wh, 56.95Wh, 56.85Wh. Is it normal? Is it possible that this setting will kill my battery? 

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RELEVANCY SCORE 59.6

Something absolubtely bizarre is happening with my mouse, and despite my efforts, I can't find any posts on google that match my issue.

About a month ago I spilled some coffee on my laptop. The laptop's built in mouse buttons stopped working shortly afterwards. I took my computer into the repair shop and had them install a brand new touchpad and mouse button set. Everything worked fine up until a couple of days ago.

First, my left click stopped working (on the laptop track pad). The next day, the right click stopped working. I could still left click using the touch pad and right click via Shift + F10. The following day I could no longer left click using the touchpad. I brought home a USB mouse today and plugged it in. The USB mouse worked great for a couple of hours, and then started failing. It will select some objects, and not others. It will left click for a few minutes, and then stop working all together. It will allow me to open new tabs in a brower, but not select other open tabs or the bar where you enter web addresses. It won't select anything off the task bar, including the windows start menu.

So far, I have uninstalled the computer's mouse drivers and re-installed them. I've rebooted several times. I've tried turning on the functionality that allows you to use your keyboard as a mouse, but that didn't work. I've tried different USB ports for the external mouse. I downloaded Lenovo's Solution Center tool and analyzed a... Read more

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RELEVANCY SCORE 59.6

My Thinkpad t420 does not have optical audio out and does not support realtek hd audio too. Conexant drivers are meant for only 2channel playback. I have a home theatre which accepts only spdif input. Can anyone help me out in solving my 6 channel playback in Thinkpad t420?Thanks in advance!

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RELEVANCY SCORE 59.6

Hello, all.My T420 audio system has worked perfectly for years. But, starting in January 2018 the microphone mutes itself, no matter what I do with its settings. Sometimes the muting happens in a few seconds, sometimes after a few minutes. I can watch it happen in the microphone levels window. I suspect a Windows update or new version of Skype caused the problem. I have been unable to fic it. Neither Malwarebytes nor any Windows security scanning software see any issues. This is especially aggravating since I'm a software engineer used to fixing bugs. (Yes, I've watched the YouTube videos about this problem, to no avail.) Anybody have a fix for this?Cheers,Dave 

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RELEVANCY SCORE 59.6

Hello everyone! I have a Thinkpad T420 with i5 2520M, Lenovo motherboard 4180DL (QM67), I want to upgrade to i7 and would like to know which models my motherboard supports. Thank you!











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A:Doubt about processors i7 for Thinkpad T420

i7-2620 and i7-2640

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RELEVANCY SCORE 59.6

Does anyone have any experiance about windows 10 and t420 fingerprint reader? Is it working to log in with this to Windows 10 (Windows Hello)?

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RELEVANCY SCORE 59.2

Hello, I got a Thinkpad X300 on a flee market, it's great but there is one problem - the screen is extremly dark.Maybe the backlight is broken and it needs a new inverter? I removed the Thinkpads screen frame cover and took a couple of photos.Do you guys spot something that looks wrong, like a misplaced or detached cable? What I tried so far to fix the issue: - changed display to bright in BIOS - no effect- changed brightness via keyboard - no effect- attached an external display - the output from the Thinkpad looks just fine on it- removed the battery and drained the power - no effect- removed the CMOS battery - no effect (just removed the "power on" lock)      

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RELEVANCY SCORE 58.8

I have a Lenovo T420.  I'm trying to get the bluetooth working but no luck.Information about the system: Windows 7 ProAll latest drivers installed from ThinkVantage System UpdateBluetooth is ENABLED in BIOS (and BIOS at the latest rev)HOTKEYS installed (and deleted, and reinstalled)Fn+F5 (or running TpFnF5.exe) only shows the Wireless Radio.  It does not show the Bluetooth Radio.Downloaded Bluetooth with Enhanced Data Rate Software II for Windows 7 (7zwb06ww.exe), but when I run it and try to install I get the message 'No Bluetooth device was detected.  Please make sure that your Bluetooth device is plugged in properly in order to continue installation.'When I do a hardware discovery in Device Manager nothing is found.The Bluetooth Support Service is running and set to Automatic. anyone faced this issue before?!!Please your feedback is highly appercheated

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RELEVANCY SCORE 58.8

For a few years I have been working with an HP Elitebook 8460p to which I connected an external drive, a Western Digital Element 2042. Working just fine. A few months ago I purchased a Thinkpad T420 and I thought that connecting the external drive would be a piece of cake but unfortunately no. So far I have been been enable to do so and I can't figure out why. When booting the drive doesn't show up in the drive's list.
I have been trying just about each port on my Thinkpad and none worked, the actual cable and port seem to work as the light at the back of the drive are on.

I know for a fact that the drive works, I just fired off my HP Elitebook 8460p again to make sure it was indeed still alive and it is fine. I can see it on my HP's boot menu and in the HP's disk management details. But not on my Thinkpad T420.

I used an enclosure with another drive to make sure the USB ports on my Thinkpad T420 are ok and this works fine. I also changed the drive's letters.

If the ports on the Thinkpad is fine if the external drive is fine, why then my external drive is not recognized by my T420 thru the USB port ?

This is the external drive's information as they are shown on the HP

A:Thinkpad T420 does not recognize external drive

It is probably just not getting a drive letter and you need to give it one are after initializing it. Does disk management see it?
Drive Letter - Add, Change, or Remove in Windows

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RELEVANCY SCORE 58.8

Hello! I have a Thinkpad T420 with Windows 7. When I try to update my Intel Graphics HD driver (version 8.15.10.2538) to the one from the Lenovo support website (version 9.17.10.3347), I get the error message "This computer does not meet the minimum requirements for installing the software." The Intel page tells me that I either have the wrong driver (which should not be the issue because I got it from the Lenovo driver support page) or OS version (I went ahead and tried both the 32 and 64 bit driver, to no avail) or that I do not have Intel Graphics (but I do). Is my processor simply not supported by the current update anymore? I have an Intel Core i5-2520M. Or does it maybe have issues with my NVIDIA graphics card?











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A:Updating Intel Graphics on Thinkpad T420

Welcome to the forum!
 
Could you please post the MTM of your notebook? It's a 7 digit code that can be found on a black & white sticker at the bottom of the laptop. Do not post your S/N here.
 
-

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RELEVANCY SCORE 58.8

re-installed windows 7 Professional. Device manager  yellowed out are:
 
802.11 n WLAN
Base System service
Biometric Coprocessor
ethernet controller
PCI Serial port
PCI Simple Communications Controller
SM Bus Controller
Unknown device
Downloaded and installed drivers from Lenovo. Windows can't find them for some reason

A:lenove thinkpad T420 installation problem

re-installed windows 7 Professional. Device manager  yellowed out are:
 
802.11 n WLAN
Base System service
Biometric Coprocessor
ethernet controller
PCI Serial port
PCI Simple Communications Controller
SM Bus Controller
Unknown device
Downloaded and installed drivers from Lenovo. Windows can't find them for some reason
 
 
explain how and where you downloaded them,
 
did you download them directly to this computer?

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RELEVANCY SCORE 58.8

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 58.4

N00b here. Installed Linux Mint on my lenovo thinkpad T420 a few weeks ago but could not boot into Linux. Eventually tried using Rescataux Beta on a usb. First I used the easy UEFI repair, which didn't work, so next I tried boot-repair. This worked, I could get into the OS. However, now I can't get into the bios, it just displays a black screen when I press F1 during loading. I tried doing a bios update, which appeared to go fine, but this didn't resolve the problem. I have no idea about what boot-repair does so I don't know where to look for a fix. Before I did boot-repair, I could get into BIOS but not Linux, afterwards, I could get into Linux but not into BIOS. Based on other posts, I've taken out the battery, and held the power button down for 30 seconds, and I've also sent @someotherguy a PM as I've seen suggested in other posts, but had no response.   # dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.6 present.
63 structures occupying 2421 bytes.
Table at 0xDAE9C000.

Handle 0x0000, DMI type 134, 16 bytes
OEM-specific Type
Header and Data:
86 10 00 00 00 53 54 4D 20 01 01 00 00 03 01 02
Strings:
TPM INFO
System Reserved

Handle 0x0001, DMI type 4, 42 bytes
Processor Information
Socket Designation: CPU
Type: Central Processor
Family: Core i5
Manufacturer: Intel(R) Corporation
ID: A7 06 02 00 FF FB EB BF
Signature: Type 0, Family 6, Model 42, Stepping 7
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode exten... Read more

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RELEVANCY SCORE 58.4

I had to replace the hard drive on Thinkpad T420.  I need to download drivers for the motherboard, specifically the network drivers.  I am running Windows 7 /64 bit.  I cannot find anything 

A:T420 Thinkpad network driver Windows 7 64bit.

Hello and welcome,
 
The drivers should be available at the EOL site:
 
https://download.lenovo.com/eol/index.html
 
Scratch that.  They're still available on the regular support site:
 
https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-...
 
The upper bar that says "Product Home" is a drop-down. Click it and select "Drivers and Software".
 
Z.

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RELEVANCY SCORE 58.4

I just installed (full installation ) Windows 10 on my Thinkpad and since then the external speakers are not working when I connect them on the minidock green entry provided. It use to work very well with the Windows 7 previously installed on the same machine and set up. Everything else is working fine. When I use my laptop without the minidock the computer speakers are working fine. Please help me

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RELEVANCY SCORE 58.4

I reinstalled Win7 before some months and I needed to install new drivers since the old ones were deleted but now I cant find the right ones, im searching one where I can use the sound buttons AND includes a UltraNav page for the mouse!

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RELEVANCY SCORE 58.4

T420, upgraded to Windows 10 Pro via a clean install ... Works great ... had to find Conexant audio drivers so the audio would work while in the docking station ... Only remaining issues are that: a)The Bluetooth light below the LCD is always on, even when I've turned off the Bluetooth interface in the W10 settings. b)The special Thinkpad key combinations (like FN+F5 to turn the wireless off or on) don't work. Any suggestions about what software or driver installs to try?

A:T420 Windows 10 Bluetooth Light Stuck On, Thinkpad...

You can use the following utility to control the bluetooth light on T420 (and other Thinkpads): Thinkpad Fan Control (TFC)http://www.tpfancontrol.com Disable the light via the context menu of the symbol. The bluetooth control via Windows system tray is deactivated after installing TFC. Obviously, this utility is normally used for other purposes... Thorsten

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RELEVANCY SCORE 57.2

HiT420 upgraded to Win 10 and 8MB RAM installed. When I go to Shop/support/Tech Support (update drivers etc); detect my product, it comes up with the 'old' stuff ie Windows 7 64bit and the old 2MB RAM etc.  This is causing me great confusion because I am unsure about downloading updates that do not reflect my current setup with Win 10, 8MB RAM etc. Someone (from Microsoft Community) who knows more about this than me suggests the following: and I quote: "According to the screenshots, and just as you've initially stated, it shows that your system is being detected as Windows 7.  However, this will also show if the machine was manufactured originally with a Windows 7 installed.  This would mean that the specifics of the machine on the serve page is not being detected, or it does not need to detect the machine at all.  If this perception is correct, what shows up is the default or how the manufacturer produced their machine.  Perhaps, for a reason that the machine was manufactured before the launch of Windows 10. It would be the best idea to contact the manufacture about downloading the drivers that will be compatible with Windows 10, and to suggest them that an update on their page will be helpful for the users." Additionally:- Service Bridge is running on my machine.Solution Centre reports no alerts.Lenovo System Update Centre reports no updates found.Windows updates are functioning n... Read more

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RELEVANCY SCORE 56.4

Hi,   Problems with my Bluetooth on Lenovo T420, it pairs ok but cant transfer data. Reports no driver for the above.I downloaded and installed Bluetooth with Enhanced Data Rate Software IIfor Windows 7 (32-bit, 64-bit), Vista (32-bit, 64-bit) - ThinkPad but that did not solve the problem though it did install TPBTooth folder in C:/DriversWhere can I find this driver please as I cant find it on the Lenovo siteThank you for your interest 

A:Where can I find Bluetooth Peripheral Device driver for T420 Thinkpad Windows 7 64bit

Hi Forgany,
 
Welcome to Lenovo Community!
 
What you can do is uninstall all the Bluetooth application and drivers which you have installed currently and then download and install ThinkVantage system update utility. After the installation restart the system and run the application, this will search for the entire required latest driver for your system.
 
Hope this helps.
 
Best regards,
Hemanth Kumar





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RELEVANCY SCORE 56.4

HelloI have a ThinkPad T420 with this characteristics: CPU: Core i5 2520mRAM: 16 GB CrucialGraphics: Intel HD and NVIDIA NVS 4200Storages:1. SAMSUN SSD EVO 850 (as OS disk in a brocket inserted instead of DVD ROM)2. WD HDD 320GB 7200 rpmI have worked for several mounts with this system perfectly and there was no problem. Newly, a bad problem has been appeared: when I put the system to sleep for a prolonged, the system won't wake up (the power LED flashing, Bluetooth LED and CPU fan being on). After force shutdown, in the boot process BSD error occurs and after several restart, finally Windows will boot. The BSD occurs when I turn on the laptop after a prolonged shutdown or hibernate also. I emphasize that the problem occurs when sleep conditions (or being turned off or hibernated) is for a long time (more than an hour) and in short time periods, there is no error!!!! The computer restart command works properly (shutting down via the Windows and booting again). I tried several solutions from internet search as followed without permanent success!1. Check disk (with /f and /r flags)2. sfc /scannow3. Power management modifications (disabling hybrid sleep, disabling HDD turn off, disabling hibernation, disabling wake up timer)4. Installing fresh Windows (Windows 7 and 10) several times5. Updating bios to the latest version6. Updating windows to the latest released updates7. Updating drivers to the latest versions8. Disabling intel SpeedStep technology from within bi... Read more

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RELEVANCY SCORE 56.4

Hey guys, my drive broke down recently  2100 Detection Error on HDD0 on my t420 thinkpad. I tested the hard drive on another computer as well via sata cables and it isn't turning on. So I figured on buying another HDD right? Well I have been looking up online about this issue and I saw that another possibility for harddrive malfunction could be my motherboard, data controller or something else shorting the hard drive. So I don't want to buy another hard drive and have it be shorted again. So my question is whether I am free to buy another HDD or if something is shorting my hard drive and if so how can I test to make sure that nothing in my thinkpad is shorting the hard drive.  Specs:Lenovo Thinpad T420  refurbished i7 8gb ramHDD-2.5"-SATA (some generic looking hardrive I can't anysort of brand on it ) pic attached

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RELEVANCY SCORE 56

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

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 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

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, is it possible to install Windoes XP SP3 64 bit on T420 14" Intel Core i7-2640M 2.80GHz 8 GB DDR3 RAM 320 GB HD DVD-RW Windows 7 Professional 64-bit laptop? I am looking to purchase arefurbished laptop but wanted to make sure that I can boot it with clean copy of windows xp and completely remove windows 7. I have to use windows xp for some of the machines to work. Thanks!

A:Is it possible to clean install windows xp on ThinkPad T420 Intel Core i7-2640 2.80GHz 8 GB DDR3 RAM

Lenovo shipped the T420 with Windows XP 64-bit installed, and still provides drivers for XP on its support site for the T420, so I see no reason why not.  

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RELEVANCY SCORE 55.6

I have a Toshiba Laptop... A week ago, my screen has started going black and coming back. Just two days ago, my screen went black and did not come back. I thought my screen was dead but then I figured that the back light of my screen was gone because when I look at the screen carefully, I barely see the things on my desktop....When I turn on my laptop, I can see my screen for 3-4 seconds, then it goes black again. Same thing happens when I log on after log off... It again gives me the light about 3-4 seconds after just logging on, then it goes black again. I finally opened up the screen, and found the display inverter... and it again gives me the light 3-4 seconds after I plugged out and plugged in the inverter cable. I am not sure whether the problem is the inverter itself of the inverter cable. I really need help.
 

A:Distinguishing between display inverter and inverter cable problem.

It sounds like the inverter may be sensing an overload on its output(s) and shutting down after a few seconds. Some possible conditions causing it could be 1) the backlight lamp(s) failing, 2) arching of the inverter output cable to itself or the frame of the LCD panel, or 3) a failure of the inverter's overload sensing circuit that makes it think it is being overloaded, when it really isn't.

WARNING: Use extreme caution when working around a CCFL inverter with power applied to it. Portions of it will have hundreds of volts of electrical energy on it. You could receive a nasty (and possibly fatal) shock if you come in contact with the high voltage.
 

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