Problem changing power supply on Dell Precision 690 - 2 MB power connectors
Hi - I'm in the process of changing the power supply on a Dell Precision 690, and i have a problem - when unplugging all power connectors from the MB, i saw there was a second (P2) connector coming out from underneath the MB, so I have the normal (power1 - 24 pin) on the MB and this one P2 (20 pin). The NEW power supply i bought doesnt have a second power connector - does anyone know what this is for?
It must be an extra 20 pin for MB that use that. Most PS's have a 20 and a 4 so you can add them together for a 24 pin. Some MB's have a 20pin and a separate 4 pin (or 6) next to the CPU. The one you say was under the MB was just tucked there I suppose; never saw a MB that had a connector underneath. I hope I'm understanding your description correctly! kevin
ASKER
Hi - apparently that connector is for the processor - BUT, now im having another problem. I purchased 2 power supplies, and connected the normal 24 pin to the MB, that 20 pin to the processor, the other connector to the cd drive, and its RAID, so i connected the othrer 2 to the HDs. For BOTH power supplies, when installed, the pc doesnt start up. Am i correct in assuming that as long as i have the 24 pin plugged into the MB, it should start?
If you have both the 24 & 20 pin connected it should start up. Do you get a power light on the front? Do you get any error lights?
ASKER
no power light, no error lights - the only thing i get is, as soon as i plug the PS cable into the wall, it makes a click sound. I also checked to make sure there wasnt an on/off switch on the PS itself, and there wasnt.
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From there it looks like one powers the CPU and the other the board. The diagram referenced doesn't show the second power connection under the board though.