I have a pc I am looking at which switches itself off after a few seconds, initially when I checked it I noticed that the AM2 processor mount had broken so that the h/s and fan where only secured by one clip. Thinking this lack of cooling would be causing the processor to overheat and trip out the machine I replaced it but am still having the same problem.
After checking all connections and reseating them I noticed that it seemed to stay on if the hard drive was not connected to the psu, thinking it may be a power supply issue I tried a new psu but again still no resolution.
After all of this I am now finding that the machine won't stay on for more than a few seconds whatever I do, it may possibly ne mobo but I'm trying to avoid that conclusion at the moment.
Have any of you guys any suggestions as to what may be causing the problem