My PC won’t turn on. Haven’t been able to set it up for a couple of months and so it’s been sitting off in the corner of my room. I set everything up on my desk and I pressed the power button and nothing. I double-checked that the outlet it was plugged into worked and the button on the power supply was on but still nothing. I looked a little bit into it and saw people saying it might be the CMOS battery dying so I changed that and still no dice. I was wondering if you computer wizzes had any other things to check that might be causing this. Thanks in advance.
“Doesn’t turn on” can sadly be anything, but I’ve seen a couple times that this can be literally just down to a faulty power button wiring. In the unlikely event that it is, it’s a very easy workaround.
Look inside, and follow the cable(s) from the power button to the two pins on the motherboard. These two pins should be directly next to each other (and are often labelled on the board as PWR_BTN or similar) - gently remove the power button wires (and remember to put them back on the same way afterwards), then try shorting the two pins with anything metal, I usually use just a flat-head screwdriver.
I repeat, it’s not overly likely, but in case it is the power button itself that’s faulty, the computer should then turn on as if you pressed the power button. Otherwise, proceed per the other post.