LG R500 Notebook crashing

LG R500 Notebook crashing I've got an LG R500 Notebook that has started crashing. It usually crashes in Windows (Vista, all updates installed) when playing a game. The symptom is that the screen goes dark and then the notebook shuts down. I suspect Windows is forcing hibernation due to overheating.
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Guest [Entry]

I had terrible overheating issue with Toshiba L20-182. It was off warranty, and paid service (sth about 100 USD) said, that it should be ok. So I have searched for disassembly manual and disassembled notebook. First thing I had to do was taking all copper heat sink and clean it with a vacuum cleaner. After 2 years of using there were two pieces of dirt hidden so deep, that compressed air cleaning did nothing. The next thing it was simply cleaning CPU from old thermal paste, and reapplying new one. And … it helped! My suspicion is that cheaper notebook do not have good thermal paste, and it simply becomes dry.