X220 shuts self off, doesn't turn back on

[First420]

Alright so just earlier today my X220 powered off completely on its own twice in a row. These first two times I could turn it right back on and get back to work, but after it occurred a third time every time I tried to turn it back on the indicator lights and thinklight would turn on, then there would be a single beep and it would shut right back off (before anything appeared on the screen)

I pulled the battery out and removed and reinserted the ram and it now seems to be running fine, but I just wanted to make sure that there aren't any underlying issues that may need to be addressed after this occurrence. The battery is still removed and I am running just off of the power cord. Any thoughts?



Intel Core i7 running 4 GB of RAM currently.

May be relevant that I've been working on a fairly complex assembly file in Pro-E/Wildfire 5 but I've never had any issues with this computer and that program before, even when rendering complex assemblies at extremely high resolution.

[RealBlackStuff]

Overheating comes to mind.
Clean the vents and the CPU cooler with canned air.
stop the fanblades from turning (with e.g. a toothpick) to avoid over-revving.
Maybe fresh Arctic Silver 5 thermal paste between CPU and cooler may be required.