restarting itself for no reason, sometimes screen just gos blank, reinstalled the os, no differance

restarting itself at any movement of the laptop
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SLFuquaConnect With a Mentor Commented:
It could be many problems, but definitely sounds like hardware. Rindi's solution is the best, thermal problems (failing CPU, CPU fan or insufficient airflow) are the predominant cause of otherwise inexplicable reboots (at least without blue screens, blue screen reboots are different, so if you are seeing blue screens just before the reboot, repost and explain what the blue screen says).

After thermal problems is the power supply (and after that the motherboard). Do you have a secondary power supply (i.e., AC adapter and cable)? If so, or if you can borrow one, try it and see if the problem persists.

Good luck,
Open the case and check all the connections. Also clean out all dust. If still under warranty don't do this yourself, but rather get a replacement.
Most likely bad hardware.  I've seen this exact same behavior recently from an Acer desktop.  Have you tried booting into safe mode?
try testing it :                                    PC doctor                        free      TuffTest lite
aclfc5Author Commented:
it was the motherboard, sorry I didn't know how to close the question last week
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