Help! System Stopped Powering up.

[cb]

We went to turn on my wife's system yesterday and nothing happened when we pressed the power on button. No lights, no fans, drives don't spin, nothing. It was running fine two days early but my wife says she had some trouble turning on at that time which she never thought to bring to my attention. Here's what I've tried so far:

- Moved plug to another outlet and swapped power cable for a known good cable
- Opened case and checked that all connections properly seated
- Checked that wires to power switch still connected at switch and mb
- Recycled powersupply switch
- Checked and recycled powersupply 110/220 voltage switch

My guess is that I've got one of the following:
1. Dead powersupply
2. Bad on-off switch
3. Dead motherboard (I assume if the mb is dead then the on/off switch can't send a signal to the powersupply. Can this be confirmed?

How can I troubleshoot these things and what other possibilities might I be facing?

Here is the configuration:
Soyo 7IZB+ mb
Evergreen Celeron 1.1 ghz upgrade chip
256 MB PC100 sdram
Voodoo 3 16MB PCI video card
Maxtor 20 GB hard drive
Seagate 2 GB hard drive
Ensoniq PCI sound card
CompUSA AT/ATX 300 Watt mid-tower case

Thanks in advance for any help/suggestions.

cb

 

[satyr451]

I think there are actual power supply testers available at some cpu stores.

Have you checked to make sure that the voltage switch on the PS didn't get thrown over to 220? Assuming you are in the US it should be set to 115.

Do you have an ATX power supply? If yes then it may not power up unless there is good ram, and a good processor on your mother board. The easiest way to check is if you have a second system with compatible parts. just swap them one at a time, if it turns on after a swap that's the bad piece. Of course that assumes you have 2 compatible computers.

Not much help but I just went through the same thing trying to find out if my new power supply was dead on arrival.... It wasn't, my RAM was toast and nothing would spin up with out it.

 

[cb]

I did check and cycle the 110/220 selector and nothing. Your idea makes me wonder if it was the cpu. It's only a few months old. This sounds like it is going to be a royal pain. There are three memory sticks, two 64MB and one 128MB. I would think all three would have to be bad for them to be a problem. I still have the old cpu, so at least I can try that out.