Hi all,

Just have a few questions that I need help with badly.

If I use a new Power Supply on the computer system I am looking to repair.(friends) should the Power supply power up if the motherboard is ok? I won't connect anything else except for the Power supply.

Also, when I am testing these Power supplies do I have to connect everything such as, HD, CD, Floppy etc. and does everything have to be connected to the motherboard such as processor, ram etc.

If it doesn't power up does that mean my motherboared is shot or could it be the pwer switch hook up.

This is crazy. How do these techies do it. So many things can go wrong. How do you find out what the real problem is without buying a bunch of new part.

All I want to find out is why I am receiving no power to my friends system.

I tried my good power supply off of my system on his and I got nothing at all. The same result. I tried his on my system and got the led lights to show but that is all. His PS would not boot my system up at all.

I am a bit confused right now and I would appreciate everybody's help on this subject so I can diagnos this system properly.

Kev



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Hope everyone is well during these trying times

Hi Kev,
You are right, it can be confusing and frustrating.
The first thing you need to do now is test the Powersupply for correct voltages. Do you know if it is AT or ATX? AT will have 1 or 2 plugs with a single row of connectors and labled P8/P9. ATX will have a single plug with 2 rows of connectors.

Yes the PSU will power up if the motherboard is dead. Except for RAM and CPU, you don't need anything else connected to check for power-up. You should see your POST screen and from there can go into BIOS.

What are the specs on both machines?

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Please let us know if what we suggest helps. This helps us help you better.

Kev. May I make a couple of suggestions? Troubleshooting,Maintaining, and Reparing PCs by Stephen J. Bigelow is an outstanding book on PCs. I have also found reading ALL repeat ALL of the PC Guide. You are starting off right on working on a PC that does not work. Study and hands on will help alot. I hope you get certified,one day I hope to work toward that. As far as I am concern, and I have been to other sites, this is the best. I have slowly built up my library of tech books and tools. Tech TV is also a good sight, especially screen savers and call for help. With all this said, someday I will be a pro too Thanks Andy

thanks.

I will get back to you on the outcome of the machine I am repairing.

thanks for the help. Anymore would be appreciated.

Kev

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Hope everyone is well during these trying times