ThinkPad T430 suddenly powers off after some time
My T430 suddenly powers off. It does not show any sort of warning, blue screen of death or anything else. It just powers off completly. And it does not turns on until the battery is removed and installed again. If it is running on AC power i.e without battery, the power cord has to be plugged out and again plugged in to make it work again.
The time interval to turn off is completely random, sometimes 1 min, 1 hour, 10 sec etc. And it can happen after boot, in bios or anywhere else.
I have confirmed that it is not a heating issue by running a stress test for more than an hour and it worked fine.
I have also tried changing RAM, removing HDD, removing ultrabay disk drive, but doing these does not produce any difference.
I have also tried pressing the power button for 60 sec, but does not make any difference.