when I went to turn it on for the first time, it didn't power up. It didn't do anything, except it does make a high pitched buzzing sound as soon as I plug in the power cable.
This sounds like a PSU issue, possibly a failed down-step transformer that converts AC house current to DC usable current.
The transformer has a series of wires which are wound around a core, also called a coil, this series of windings brings down the 120-110 Volts AC to a usable voltage the computer uses to run.
When a transformer goes bad, the coils vibrate, this is the buzzing sound you hear.
I am inclined to believe, This is NOT a cooling fan making this noise, because a cooling fan only spins when the power supply is supplying power to the PC.
Even with the computer off, the transformer is still operational to supply current to the controller board, which is waiting for an action from the computer's power switch located on the front of the computer tower.
It is strongly suggested you invest some money in a new PSU (power supply) and replace this one. As this current one is a safety issue and is not serviceable by the average home computer user.
You can purchase a better one with a better output rating.
Just make sure the PSU you purchase works with this computer.
If it is an ATX power supply, purchase an ATX power supply.
If it is an older Baby-AT you need to replace it with a Baby-AT type power supply. (These are for older computers, before ATX came out)
Please be safe and keep in mind the precautions needed to work safely inside a computer case.
Specially with precautions against ESD, keep yourself grounded to the computer case while working inside the computer case.
Static electricity from your body can permanently harm the components found on the motherboard.
Edited by MrBruce1959, 21 November 2010 - 04:10 PM.