Would you believe that the whole thing may be working? ;) First thing to do would be re-initialize the "parameter RAM." Hit command-alt-p-r on power up. (I have seen corrupted PR cause this kind of problem.) There are also a couple of things that you can (very safely) reset with other hot-keys. You'll have to look them up, though. You might check to see if there's any flash or what not on the monitor when the computer comes on. If the monitor has a power-save mode, and starts up that way, does it turn on at all? ... but now that I read the next paragraph :) Very strange. What's common between the two boards? Do you have, or can you get, a known-good monitor? Are you using the same RAM in both boards? That could be suspect. If you've been plugging the drives back into the board, don't. Take everything out -- including un-used cables -- except what's absolutely necessary. Try again that way. This is also a problem. Just a stab in the dark, try blowing the board out. I've seen some strange dust-bunny related problems with macs. :) Make sure there's no way the board can short itself out to ground somewhere... ... and get a multimeter. Nope, but again, take it out, and the floppy, and whatever else (boards, etc) you can. Bad hardware makes computers do funny things. Err -- you could also get an adaptor to plug a vga monitor in, and use a monitor you know works, to eliminate that possibility. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '