Question : Problem: abit nf7-s will not post

I have an old but great Abit nf7-s motherboard running fine.   Surge protected with ISOBAR surge protector and another computer on this surge protector.  Lights go out.   Every thing works except the Abit will not post and has no video.  NO beeps no video.  Everything spins up and works fine.  Has changed  2 seperate video cards that work--no video.  Changed CPU no video no post beeps.   Is the motherboard dead?

Answer : Problem: abit nf7-s will not post

A power surge that makes it through the surge protector -and- the power supply could fry any voltage regualtor or chip in the machine.
[Drives, add-in cards, Video, anything]
A fried and shorted chip -anywhere- can keep the system down as it's effectively shorting a rail of the PSU [power supply] and the safety features in the PSU won't let it start with a ground.

I'll agree the mobo is most likely (most chips on it) but any of: a shorted floppy drive, optical drive, hard drive, video card, NIC, sound card, modem, anything that gets power .. could do this.
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That's why it should be striped down to a minimal system.