I have an HP Pavilion DV9913cl laptop for about 5 years. Last 2 years it's been storaged as broken. Recently I tried to fix it, and I have this issue: it works for 30 minutes to 1 hour, and then the fan starts working very fast at some point and it shuts down unexpectedly. After that, it won't turn on for some time (5 to 10 minutes), and then it works again, but shorter than the first time. At first, I tought it was an overheating issue (because it has a long overheating history), but the fact that even if I turn it on for 3 seconds and then off, and then I try to turn it on again and it won't work makes me think. No matter how long it worked for the first time, second time it shuts down after 3 seconds or so. Laptop has a huge overheating history, I even think that the chipset has been changed. I tried changing the termal compound, cleaning the dust, fan works fine and I even flashed BIOS to the newest version. Anyone got an idea?