Yeah, I know, HP laptops are the worst. Please bear with me
I had a problem with my laptop some months ago (it worked brilliantly till then): whenever I stressed it too much, it froze/shut down. I needed to wait 15-30 minutes before turning it on again, because it would shut down if I wouldn't let it cool off or something (it's overheating but.. It isn't? ). But the fan and heatsink were totally clean because I took good care of it blowing compressed air into it (while turned off, of course) but it still overheated frequently since the cooling system on the HP laptops suck so much. So it was weird because I even opened it and cleaned it thoroughly and replace the thermal compound on the gpu and processor.
So one day it finally gave up (died), and the guys from a service said it's the motherboard. I replaced it (found one ~130$), put it on and applied new thermal compound. I opened it and it worked again but after a little time it froze again while playing an 1080p vid on YouTube (I was testing it). So here again I was with the same problem from 3 months ago.
I thought it was the processor now, so I replaced it with a second-hand one. Same thing. I borrowed the ram and hdd from my brother's computer, and it still froze while stressing it with everest.
Before I changed the motherboard it would freeze even at ~50C cpu and 35C gpu, now it freezes at something like ~75C cpu and 50-55C gpu.
So now I'm broke, with a broken laptop, and asking desperately for help. I basically changed the whole hardware of the damn laptop and the problem persists. I can't afford buying a new one, and I already spent ~170$ which was all I had.
I can specify that I used AS5 as a thermal compound and I worked very gently with it, and that I know a little about computers so I didn't mess anything up... I guess.
I'm starting to think that the whole assembly of heatsink and fan is faulty and that it's not cooling properly. I can't think of anything anymore.
Model: 1.5 year old HP Pavilion dv6-1212sl, Microsoft Windows 7/Ubuntu (but the laptop freezes/suddenly shuts down even in bios or with hiren's boot cd so it can't be software-related)
Sorry for the long read and for my bad english, and I hope someone can help me some way.
Thanks a lot in advance.