Posted 9/21/2015 07:35 (#4800529 - in reply to #4799660) Subject: RE: Computer keeps shutting off
Central Nebraska
As has already been discussed your problem is most likely the main power supply but before replacing it I would run the computer with the case open and see if the processor cooling fan is running. I suspect it is since the machine works for up to 30 minutes but an overheating processor can shut a computer down.