My PC shutdown because of CPU high temperature and, after resetting, I found that the cpu and chassis fans on my Asus A7V8X-X mobo were not running. When the mobo is powered up (and before the CPU overheats again) I measure +2v between ground and +12v of the cpu and chassis fan connectors. The fans work ok if I separately apply 12 volts to them. What could be causing only 2v instead of 12v at the mobo connectors? Is it the mobo, or is it the PS? It's not like it's zero volts like with a blown fuse. But it's 2 instead of 12. And I can find +12v at the PS disk drive accessory connectors. Does the mean the PS is ok? Or are there different +12v outputs from the PS?