OS 10.7.3 - This issue was present in 10.6, so not an OS related issue.
On this sytem, it seems at times I may have the laptop keyboard partially covered, the entire system will freeze. At this time, there will be artifacts all over the display. No mouse movement or anything. If I force boot the system by holding down the power button, all comes back happy. Typically I would also remove stuff placed on the laptop keyboard (which would be there temporarily anyway, loose papers or a manilla folder).
This does not seem to happen in any repeatable way. The last time this happened was about 3 months ago, and has happened almost since I purchased the machine. Being so intermittent, I was unsure what the problem was and now out of warrentee.
My assumption is that the video card is overheating, and that it may vent through the keyboard. I know the processor vents out the back. Is there anything I can do to help keep the vid card cooler? I am not sure if I can clean and apply fresh coat of thermal grease? I have not pulled this apart that far.
Thanks for reading and your time.
X-Serve, iMac - Various years, Macbook Pro 2010, iPhone, AIX, Windows 7, Mac OS X (10.6.8)