having to send my pc back as it started doing funny things today, it turned itself off for no reasopn. called pcs tried removing graphic cards and it still turned off , sounds like a overheating problem to me but only thing i think it could be is the cpu. cpu cooler is fitted well. all working , but as soon as you turn it on it turns off after 30 sec sometimes less , was just wondering if there is anything else i could try before i send my lovely pc back as i will miss it