First thing to try is replacing the coin cell battery that retains bios info when the computer is disconnected from power. It's a common battery that is available for $1 or so in any store that sells batteries. See your manual for info-- Support for OptiPlex 9010 | Overview | Dell US You have an old model and that battery needs to be replaced every 5-7 years or so.
Well my problem is that the computer had disconnected the power cable, after several days it was reconnected, the computer tries to restart by turning on the fans and then it turns off, that is normal when it has been disconnected, then when I press the power button, does not turn on a light from the power button, then I remove the power cord again, I wait a minute, turn the fans back on, the power button lights up white and then turns off, I proceed to turn on again and it does not respond for anything, no colored indicator lights, or fan lights, I proceeded to sink the power supply button and turn on the green light and turn on the fans, now I don't know what to do, I try to find answers, and I start to think that if it is the power button that is faulty or it is the motherboard, I ask for your help to solve this enigma of my computer, please wait for your help, thank you. Dell optiplex 9010 mt 16gb ram Amd radeon rx 480 8gb Power supply 600watts
Dell optiplex 9010 won't start