20 Most Recent Lenovo ThinkPad T400 PC Notebook Questions & Answers

As it was left with no ventilation underneath for the cooling fan, it has desoldered the GPU.
Motherboard replacement or GPU re ball required.

Lenovo ThinkPad... | Answered on Jan 20, 2018

try taken out your cmos battery some times this will get rid of passwords,its the small round battery on your motherboard.leave it out for a couple of secs then put back in.might work for you,good luck.

Lenovo ThinkPad... | Answered on Apr 06, 2015

It might be installing an update. If you disconnected something while it was powering down - Internet, screen or something like that, it might have frozen.
Make sure you have power cable plugged in and the same with the internet (if you normally have one). If it stays the same way for more than 30 min. then you can hold down the power button until the pc turns off (5 seconds). Then wait 30 seconds, then turn it on again.

Lenovo ThinkPad... | Answered on Jun 24, 2014

That is probably because the system thinks you wish to adjust something or back up/restore data and has disabled the power button. Remove the USB lead and it should shut down.

Lenovo ThinkPad... | Answered on Apr 10, 2014

Please specify your problem in details. is it windows logo or motherboard logo.
If your PC freezes at Windows logo then its the problem of your operating system, try to repair it or have a fresh installation with a proper Windows bootable disc.

Lenovo ThinkPad... | Answered on Jan 17, 2014

Hold power button till it does.

Lenovo ThinkPad... | Answered on Dec 30, 2013

First check that there is nothing under the keys and if everything is clean then you will have to change the keyboard with a new or used.

Lenovo ThinkPad... | Answered on Nov 01, 2013

Follow these steps to resolve your problem
First i will suggest you to start your system in the safe mode by press and hold F8 keys until you get Advanced Options menu screen and then select the safe mode
-After this do the clean boot of your system
-run system diagnostic online
I am also sharing a video link that will really help you to fix this error message
Best of luck

Lenovo ThinkPad... | Answered on Jul 22, 2013

I am looking for a solution. My laptop blinks this same way. I updated the system

Lenovo ThinkPad... | Answered on Jul 20, 2013

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer

As the computer is booting repeatadly press the F8 key as the computer is booting

If done properly the user should get to a screen similar to the below screen.

Select the option for Safe mode command prompt only

Windows Advanced Options Menu
Please select an option:

Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt

Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode

Start Windows Normally
Return to OS Choices Menu

Use the up and down arrow keys to move the highlight to your choice.

select safe mode with command prompt

Then type at the C:\> prompt: type


and hit Enter. You'll see a dash (-) at the DEBUG prompt. Now type:

o 70 2e

which will show as -o 70 2e at the DEBUG prompt. Hit Enter. Then type:

o 71 ff

and hit Enter. Finally type:


and hit Enter one last time to quit DEBUG back to the C:\> prompt.
Now you're ready to reboot your PC, and press the appropriate key or key
combo (look it up in your motherboard manual if you don't know it) to access
your BIOS Setup.

Youll notice the password is gone.

If this fails try typing

At command prompt type debug
you will get a - prompt where you can type the following (<enter> means press enter, not type enter*)

JB 103 <ENTER>
<ENTER> just hit enter on this line

Basic BIOS password - works 9.9 times out of ten

If this fails you will need to

Select safe mode with networking to download

you could download all of these or just one save them to a usb drive for later use if one fails to remove the password


At some stage you might need to press Ctrl+Enter rather than just Enter if on a Dell Latitude E5410


A CMOS BIOS password recovery tool

Editors note: This tool should only be used by experienced computer users.

Please see the enclosed read me if you would like to run it from Windows.

Failure to follow instructions (from Windows) will cause your anti-virus to flag this as a virus.

Hope this helps.

Lenovo ThinkPad... | Answered on Nov 28, 2012

Welcome to Fixya

The sstem has RTC battery. Please click this link then go to FRU removal. Then click RTC battery.

Thank you for using Fixya!

If you need further help, reach me via phone at https://www.6ya.com/expert/elixirjose_00375ea24bd8141b

Lenovo ThinkPad... | Answered on Aug 04, 2011

Welcome to Fixya

The system has TRC battery. Please click this link and go to FRU removals and repalcement then click Real time clock batery.

Thank you for using Fixya!

If you need further help, reach me via phone at https://www.6ya.com/expert/elixirjose_00375ea24bd8141b

Lenovo ThinkPad... | Answered on Aug 04, 2011

Hi AJ,
This is not a hardware related issue. I most probably is related to the operating system. Once the computer is loading up the kernel files and advanced drivers and applications on your computer, it freezes up. To further isolate this, you need to boot the computer to safe mode.
Booting to Safe Mode:
1. Turn the computer on. Start tapping on F8 as the computer is loading up. 2. You should be able to see a black screen with options on it. It is the Advanced Boot Options. 3. Choose Safe mode or safe mode with networking.
In Safe mode, open the system configuration utility.
1. Press the Windows key + R 2. Type msconfig then click on ok 3. Click on the startup tab 4. Click on the disable all located on the bottom 5. Click apply and then ok 6. Restart your computer to normal mode.
If this works you are not done yet. You need to open the system configuration utility and check on the items under the start up tab one by one. You need to find our what program there is causing the computer not to load up. Once identified, You need to uninstall it from your system and your problem is resolved.

Lenovo ThinkPad... | Answered on Jul 08, 2011

Hi guest, try to turn off the pc by using the power button. Then remove the cables and battery on the laptop. Then push & hold the power button for 5 seconds. Reinsert the cables and battery then turn on the pc.

Check if you will be able to shut down your pc using the operating system..

Lenovo ThinkPad... | Answered on May 17, 2010

dear go to foliwing link and downlod the software wich can help for opening your password

be for do any thing folow the instrucation


Lenovo ThinkPad... | Answered on May 05, 2010

need to change the LCD screen or the backlite or the invertor board behind the screen
check with a tech shop...

Lenovo ThinkPad... | Answered on Apr 27, 2010

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