Azza p4x2-av
300 watt power supply model lpm2-20

Outputs:
molux hard drive plug red 5.19 volts
yellow 11.41 volts

motherboard 20 pin plug red 5.19 volts
yellow 11.44 volts
orange 3.33 volts
white -4.95 volts
blue -11.24 volts

4 pin square motherboard plug yellow 12 volts
yellow 11.44 volts

6 pin flat motherboard plug has 1 red 2 orange and 3 black (ground)

judging by the above outputs, is the power supply with in its rating?

Tested with all plugs disconnected and shorted green wire to black to turn on the power supply, Turning on the pc, the fans spin, no beep, no key board led lights, no video.

If power supply is no good, is there a comparable one with the correct motherboard plugs?

+3.3 VDC good range is 3.135 to 3.465 VDC
+5 VDC good range is 4.750 to 5.250 VDC
+12 VDC good range is 11.400 to 12.600 VDC

Unless you are using a serial port the negative voltages do not matter but they are good as well. It would also be good to see the loaded values but a bit harder to measure. Have you looked at the capacitors on the motherboard to see if they are bulging or not looking normal?

I swapped out the motherboard with an asus a8v-e se. The fans spun up, the mainboard power led lights, the dvd rom blinked and the tray will open and close when the button is pressed. I added a motherboard speaker. No beeps. The led on the mouse lights up, no keyboard lights. I did not have a pci express video card, so I used a pci video card. No video. The motherboard was giving me problems before. It was swapped out, but it still worked to a point, so I kept it. I tested the voltages and all looked good under load. I disconnected the power supply cord and removed the bios battery and will let it sit for a while and try it again. I am not sure what else to test.

The mainboard "Asus A8V-E SE" and your PSU are ancient hardware. Therefore one of them may gone.
Test the mainboard with another PSU. You don't need the −5 V line. Only some ISA cards e. g. ISA soundcards use the −5 V line. Therefore the −5 V line has been removed with ATX v 1.3. Use for test of this mainboard a minimum of components (CPU+cooler, PSU, one memory module, graphics card, keyboard, PC speaker) and only components that work. Test them on other hardware in doubt before using them on this mainboard.

Ok, I will try with a new PSU and post back.

Since I started a post on failing hardware, I have a problem that I partially fixed with a Dell Dimension xps t600r. Initially, the pc would only boot to the dell splash screen. I found a pdf file from dell on trouble shooting the led lights on the back panel of the pc and the beeps. I took all the boards out and carefully cleaned and reinserted them and found that the cd rom was bad and replacing it allowed the pc to finish booting from looking up the led code and beeps. I can use a freedos disk and run dos programs fine, but it will not finish booting any cd rom disk I try. Example errors are:
1. Panic: module_register-init: module named acpi/atpic not found.
2. Acpi: bad rsdp checksum
3. crc error
The cd would initially boot to the selection menu, then it would freeze at decompressing linux and reboot. All 4 of the led diagnostic lights are green and the post beep at boot. Sound like a memory problem?

I feel that the cd rom is not reading the disks and there for giving the above mentioned errors. It happened with every live disk I tried (8)and know to be good.I will swap it out to verify.

It was the power supply. Replaced old one with a new unit and it booted.
Thanks for suggestion.

To clarify, it was the asus board that booted.