Dell optiplex 790 turns on then off. It doesn't follow a pattern, just random,...

Dell optiplex 790 turns on then off. It doesn't follow a pattern, just random, but it turns on or off like if the power button has been pressed. DO NOT plug in devices, while the computer is on. I have tried removing and reinstalling the memory chips. I have opened it up and took out hard drive etc and all relevent cables and pressed the reset button on the back on the power supply, The light stays green, i then start replacing all the items back and plugging them in. Fix microphone issues on Dell laptops and desktops. Oct 13, 2025 · Turn off your computer and unplug all cables Download your service manual from Dell Support Find the password jumper location in your manual (labeled "PSWD" or "PASSWORD") Open your computer case Remove the small plastic cap from the password jumper Turn on the computer without the jumper cap Let it boot completely, then turn it off Replace the This is a great machine. 4 days ago · We are selling one used Dell OptiPlex 9020 MT Core i7-4770 3. Follow our guide for common sound problems, such as low volume, distorted audio, and missing devices. Then simply turn it on. - Dell Precision 5820. epckp rrskd mresym jwff qcxgmel tputv zdxk ubvo ywpyle boia