Question about IBM THINKPAD T400 P8400 PC Notebook

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IBM T400 turns on then off

When i connect the charger to the T400 the laptop turns on for 3-4 seconds and then shuts down.It keeps doing this until i remove the charger from the laptop.No video appears on screen.I know it's not the charger because i used my friends working charger.Help please!!!!!

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  • 30 Answers

Youre laptop is overheating

Posted on Apr 26, 2010

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Posted on Jan 02, 2017

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1 Answer

When i start Lenovo thinkpad T400, i get to see a lock symbol with blank screen


Hi sundar1968,


I see that your Thinkpad T400 machine is locked and you are unable to make use of the machine.

to be able to unlock the machine power the system on once turned ON you will see a Lock icon on the center of the screen just press and hold down the FN key for at least 5-7 seconds or if possible untill the lock icons shows that it is unlocked.

This should help you with your concern.

Have a nice day,

mvincentc

May 11, 2011 | IBM Lenovo ThinkPad T400 7417 Notebook

1 Answer

My laptop Lenovo T400 2765T7U is not operation, please help me !


Hi hieuhvat,
try to do this:
- remove the battery and charger (everything connected to the pc) then press the power button for 1 minute.. - plug back in the charger - after few secs try to turn it on
hope this helps :D

Apr 05, 2011 | Lenovo T400 Notebook

1 Answer

Lenovo t400 cannot boot. have "z" light only


Hi vincent,

I see that you have a "z" light indicator on the system when powered ON but you see no video on the screen.

The "z" Indicator means that the system is turned ON and ready to use but is in standby mode.

To disable standby mode on your system simply press the FN button for about 5 seconds on the system make sure that the machine is turned ON, this will make you system go back to normal mode.

Note:
For additional info on the issue the system can be put to standby mode by holding down the FN+F4 for a second or two this will enable standby mode on your Thinpad T400 and to disable the standbymode press and hold down FN for 5 seconds.


I hope that this will be of help regarding you concern, have a nice day.







Mar 30, 2011 | IBM Lenovo ThinkPad T400 7417 Notebook

1 Answer

My lenovo T400 will not shut down even when all applications are closed. I have to manually shut it down with the power button


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..

May 15, 2010 | Lenovo ThinkPad T400 PC Notebook

1 Answer

I am locket out of my new t400 laptop


Try to reinstall your coumputer if it dosent work call the company

Mar 22, 2010 | IBM Lenovo ThinkPad T400 7417 Notebook

1 Answer

Computer Shut Down Problem


Is the computer taking forever to shutdown in the blue screen or is it something else. Perhaps try closing the applications running with the system to help the process speed up and actually work without the usage of the power button.

Feb 06, 2010 | Lenovo ThinkPad T400 PC Notebook

1 Answer

How do I start my Lenovo T400 in safe mode?


Just keep on pressing F8 during system startup. It will land you to a Windows with Safe Boot as first option.
just press Enter.

That's it.

Jan 19, 2010 | IBM Lenovo ThinkPad T400 7417 Notebook

1 Answer

Ibm thinkpad will shut down after running fine


its a silly question but are the vents on the sides and underside of the laptop unobstructed. ie dont use it on a bed or any non flat surface. Try this and see if your problem ceases

all the best

Mark

Aug 24, 2009 | IBM ThinkPad T400 PC Notebook

2 Answers

IBM R50e thinkpad - where is the reset button?


keep your power button pressed for 3-5 seconds to reset.
let us know the results, thnx

Jan 30, 2009 | IBM ThinkPad R50e Notebook

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