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T400 Stopped powering on, fried motherboard?

post #1 of 3
Thread Starter 
I've got a Thinkpad T400. The warranty ran out a month ago, so I am praying to the gods maybe I've missed something and somebody here can help:

It was working perfectly fine. It had been sitting on its dock for about two months, with regular use (bed-time movies). It was functioning perfectly fine an hour before this happened, I took it off the dock after powering it down, put it in my carrying bag, and brought it to my local barcraft. When I got there, it wouldnt power on. The indicator lights would flash on, then off. Then nothing. I figured the battery might've died or something.
However, when I got home, same issue. Plugged into AC or not, on the dock or not. I have tried the following:
Static discharge (Pressing the power button a billion times with no battery or AC)
Resetting CMOS
Reseating RAM, Battery, DVD drive, and HDD
Booting without any of the above plugged in to coax a beep code out

Nothing. There are no burn marks or fizzle marks or broken anything that I can see anywhere on the laptop or on the motherboard. When I have no battery plugged in, and the laptop on the dock, with AC in, I now get a solid AC indicator light, but still no power-on or beep codes or anything. Plugging in the battery yields a flash, then a solid battery/ac, but still nothing.

Does anybody have ANY ideas as to whats wrong? I've made extra sure to take damn good care of this laptop and I'd be really disappointed to find out it killed itself for absolutely no reason.


EDIT: So I took it completely apart and turned it on anyways, and it started working again. I went through piece by piece and tested it, and it worked fine.
When I got to the HDD, however, it beeps once and hangs at a black screen with a flashing line.
Edited by hglazm - 11/21/11 at 4:49pm
Moosejaw
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Moosejaw
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post #2 of 3
So now it's just the HDD? First see if the HDD is recognized in the BIOS. I'd try booting from a CD or USB drive (anything will do, or just make one from http://www.pendrivelinux.com/, even something small as MemTest is fine). Maybe check the BIOS settings for the HDD - it probably should be in AHCI mode. After that, perhaps try to run the DVD for whichever Windows is installed, and try to repair the install.
 
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Lanbox Lite
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post #3 of 3
Thread Starter 
Alright, I fixed it, I have no idea how though.
I had originally put the HDD upside down (durrr), but flipping that didnt fix the problem. It would just beep and loop into reboot.
So I disassembled it completely, gave it power, and magic! It worked. Put everything back in one by one and it just started working again.
Moosejaw
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Moosejaw
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Hitachi Deskstar N/A Win7 x64 Alienware Optiplex 
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