There was no result of the initial powerup, but C12, Y1 and D1 were all missing.  The analog board seems to be fine, and (if I'm not misremembering), there was power to both the floppy and hard drives.  However, the screen did not come on.  I was going to recap it and replace the parts.

I should have followed-up, should/can I power it on without Y1 or D1 - i.e. to test it before I buy replacements?