"Etno" wrote in message
...
Hey folks,

Got a strange problem here with my second pc.

A few months ago it all of the sudden started rebooting out of no where.
It
rebooted while in Windows and also during bootup, so I thought it was a
windows problem, but it's not. It even reboots itself while I'm browsing
the BIOS or in Linux, or even 2 seconds after I turn it on (before any OS
starts loading).

Try reseating the CPU. Clean it up and reapply new thermal paste or arctic
solver, then clean up and reinstall the heatsink/fan. Also, be sure that the
fan on the CPU heatsink is working properly. I'm leaning toward the CPU
because the system had been working fine but then started to exhibit this
symptom suddenly.

It could also be caused by residual effects from a past lightning strike
near your home... which could have even traveled in through your modem.
These are the worst things to diagnose because everything could seem fine
for six months after a major storm, but a component that was compromised and
is now marginal may suddenly decide to start crapping out on you. :-(