Well I just went ahead tested them with the digital. It appears yellow is 12 and red is 5 V.
I am showing 12.19 v and 5.09 V respectively.
So I guess that's rules out my power supply as the problem?
The big question now is, exactly which contacts on the pci busses regulate/distribute power? Are there any precautions I would need to take when testing these leads, of course taking great care as to not cross contact test lead.
Ooops. Somehow missed this one. Yes, it looks like your power supply is nice and strong. I don't have the info handy on which pins in the PCI slot supply power but it's pretty easy to check, if a bit tedious. With the machine off, just connect one lead of your ohmmeter to a 5V pin on the power supply connector. Then go down the PCI pins with the other lead. Anywhere you find 0 ohms, is a 5V supply pin. Similarly for the 3.3V pins.
I like to set the ohmmeter to audible for this test, as it saves looking over at the DMM display constantly.
If you're worried about a possible short on your motherboard, check the resistance between the 5V and GND and 3.3V and GND pins on the power supply connector. IIRC they should be about 500 ohms. Which may sound low, but there's all that accumulated leakage through all the semiconductors. 500 ohms is reasonable.
Jeff Walther
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