First, I know it won't get through POST. No RAM/CPU make that fairly obvious. There is a 2-digit seven segment debug display on the board. (It's an ASRock Z77 Extreme4.) Can I expect any of the following, if the motherboard is good?
- The 2-digit 7-seg display to have some diagnostic code, probably something along the lines of "No CPU"
- Power LEDs on the board itself (if they exist) to light?
Whirs or full-action from case fans or PSU fans?
...basically, some sign of life.
I'm looking for some way to isolate and test just the board itself.
The PSU looks okay: shorting the green wire to a ground I was able to power fans, and a DVD drive that seemed to be endlessly resetting itself (probably due to there not being anyone on the other side of the SATA cable).
Also good to know: Would powering it up without a CPU/RAM damage the motherboard? I can't see why it would, but you never know...