04-27-2011 10:32 AM
I have a thinkpad T400. Couple of months ago the problem started. I could not shut it down it just keep re-booting. I had to press and hold the start button to shut it. Now it won't boot at all. It beeps 1-3-3-1 and just sits there. When I press start button all lights come ON for a while and after only battery , AC and Ready lights stay ON. Here are few things I did so far without any luck:
1. Removed battery and AC adaptor waited few minutes put it back - same problem
2. Removed CMOS battery. DIMM cards waited for ten minutes replaced - same problem
tried with swapping DIMM cards - when I put only one card on top slot it says put the card on zero "bottom" position. After placing the Mem card on the bottom slot no thing happens. It beeps again and sit.
When I checked in the manual it says either DIMM or System board. I do not know which one is giving me the problem. I just do not want to replace all parts without knowing. Can any body help please or had similar issue and solutions if you managed to solve it. Thank you.
04-28-2011 07:27 AM
05-02-2011 08:57 AM
05-02-2011 01:10 PM - edited 05-02-2011 01:10 PM
You can try to clean DIMM contacts. Is it still under warranty? If so, it is time to use it. If it is not, do you have integrated or discrete video?
05-03-2011 12:01 PM
05-03-2011 02:49 PM - last edited on 05-03-2011 02:56 PM by andyP
The only number I found under the laptop is :
Type 2764 CTO S/N xxxxxxx 09/06
Is this what you are looking for?
Moderator Note; s/n edited for members own protection