I've been given a asrock 4core dual-sata R2.0 never been tested. I've mounted a dualcore E2140 512-DDR1-RAM and an AGP 4650 video card and later a Geforce6600 PCI-Ex (all surely working bcoz from another working pc). At power-on mobo doesn't start up: fans spinning but nothing on video. Tried pulling off single components but nothing changed also no beep comes from the mobo (I'v linked it to a speaker).
At sight no visible damage on mobo and no bad capacitors. I'v tested almost all capacitor with a multimeter and still found no bad one.
What can I still test/control ?