T400 - will not be turned on, no lights

Hi all

I have an ' 09 beginning T400. It has been a fantastic portable, although now I only use it when I travel.

Last year it worked very hot, especially when playing games. I use a portable fan to cool, don't think that it checked because I don't use it very often.

Today it froze and I force shut it down by pressing the power button. When it is restarted it ran a disk check (I had a sleep and saw no results) and when it loaded windows he was running very slowly. After a bit of experimentation, I worked on the wifi and switchable graphics drivers were not working. I was able to get to a usable state by disabling the discrete graphics in the bios and boot into safe mode.

I was about to reinstll the drivers. While the download I tried to re - activate the discrete graph (in bios) and started. However, until I'm on the Boot Manager screen, I got a BSOD (c000021a). I turned off the laptop, but it wouldn't start again. None of the lights on the laptop work, even if it is plugged.

The only things I changed in the bios were switchable graphics (which I changed the default setting) and the "beep" on the hibernation. I don't know if the battery has a charge, they should be 100% it was plugged all the time. I noticed that the laptop was working very hot while working with it.

Our tech guy seems to think that the motherboard may have overheated and "fade", but I'll be away for a few weeks and he has no experience with Lenovo computers. "." So I was wondering if anyone has experienced this before, or if there are tricks to get the laptop begin again (if this isn't a motherboard problem)?

Thank you!

Try the routine of 10-30.

Remove the battery and unplug AC. Now press the button 11 times and on the 11th press hold for 30 seconds. Attach the AC and see if it boots.

This question poison old ThinkPad forever. I haven't found the true cause other than my age-related speculation.

Tags: ThinkPad Notebooks

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