My Dell PC won't power up........... is the power supply the problem?

Hello. I am working on a Dell desktop PC for a friend of mine. The model # is Optiplex GX620.

The computer will not power on. When I plug it in a couple of bulbs on the mother board will light up. However, when I hit the power on button it does not do anything.

Note...... the power button on the front has a yellow light shining through it. I assume that this is related to a power supply problem?

I did order a new power supply and I installed it. However, it did not fix this problem at all.

How can I tell what is actually wrong, and what can I do about this?

Thoughts? Suggestions?

Thanks,

TC

 

the yellow light on the power button probably indicates that the unit is receiving power. I would expect it to go green when turned on.

It may be either a faulty power switch or dead motherboard. Try and locate where the power switch connects to the mother board, disconnect it the replicate the push button action by shorting the two pins that the power switch connected to with a paper clip. if it still doesnt boot then I would speculate its a dead motherboard.