Hi,

I'm using a known good Apple HiRes RGB monitor via the DB-15 port. I have also tried various VGA CRTs and LCDs (using the VGA port; no adapters) with no luck.

Having tried all of the suggestions mentioned in this post with no results, I think there's something wrong with the logic board, and it'll have to be either repaired or replaced.

Until then, I fear it's like repeatedly beating one's head against a proverbial brick wall.

I welcome any and all other suggestions besides those already mentioned.

c