first thing to try is replace cmos battery w a brand new one then clear cmos settings on motherboard by reset RTCRST jumper.
I have been working at home for a year and a half. I have just retired and turned in my work computer. Now, when I tried to connect my Optiplex 790 for general use, it turns on then shuts off. It keeps trying to start up, but shuts off. The power button shows blue and there are no beeps or warning numbers showing. any help would be great.   jd
Computer keeps shutting off.