[nottinmatterz]

I just bought a Used ASUS P8P67 WS Revolution

It is not displaying video, I've hooked a Radeon 5970 in the top PCI-E slot and tried a DVI cable hooked in either slot to a monitor and neither are showing anything

Other problem details:
Sometimes after coming on for 5 seconds the fans turn off then restart back on
This card with LED readout and power/reset buttons that came with motherboard does NOT work, i have to hook a power switch to start
No error beeps are heard, I have a speaker plugged in, even tried swapping the speaker contact around to make sure I didn't plug in wrong

Troubleshooting steps taken:
I have tried two PSU's that produce the same result
one brand new high powered PSU
one used 660W

I have tried two different Radeon 5970 card's, both used

One thing, tapping the power button does not turn it off, have to hold it down for hard shutoff

Could this be caused by a bad CPU or motherboard/LGA socket? If something were bad I thought the error would BEEP a code?

Other Parts:
2x 1GB brand new sticks of DDR3 RAM (low speed)
Brand new 1155 G530 CPU (listed on compatiblity list for the MB)

[JonIngall]

As a long shot, boot the mobo with the gpu removed. This should trigger a beep code. Shut down and put the card back in, and try again.
Only saying this as I had similar before. It worked for me, so here's hoping...

Tapping the power button (in my case) will either shut down or sleep the pc when in Windows. Hold for 4-secs for instant power off. Not faulty by the sounds of it, the power button functions are user-configurable and those are the defaults.