Question about Dell OptiPlex GX280 PC Desktop
The three most likely culprits are the power supply, the motherboard itself, or the power switch. Chances are good that the power supply went bad, so if you just want to try replacing something, start there.
If you have a multimeter and you're comfortable using it, remove your computer's case so you have access to the motherboard and turn the PC on, then meter the connections coming out of the power supply. If they all look good (giving out 12 volts, 5 volts, and possibly 3.3 volts or less depending on your motherboard) check the connectors coming off of the motherboard. If those connectors are transmitting the voltage, then check your power switch to see if it changes state when you press it.
One of those three components will almost certainly be your problem. If you don't have a multimeter, your best bet is to start with the power supply. Other than a floppy disk drive, that's usually considered the most likely component in a PC to fail.
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Posted on Sep 30, 2010
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Posted on Jan 02, 2017
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