Odyssey monitor boards

[hwy111]

 :99-My Dad's SGI Odyssey monitor went black while playing a game.
Everything else is still running normally in the background. Did a safe clear and full clear to no avail. You can hear everything running but no picture.....it even goes into MMS mode.....everything runs except no picture.
I've read many posts here and on Robert Winters site about similar problems with the monitor. Before this happened, the monitor was in perfect shape with very vivid resolution and color. Could it be a monitor fuse and if so, where exactly is the montor Fuse?? I'd rather try that before replacing boards if that might work.
People have reported of having the same problem and replaced the monitor boards and all was fixed.

Where are the monitor boards located....I see the board attached to the yoke and there is another board attached to the left side (when facing the front of the monitor) of the case below the heat sink board......are those the "monitor boards" everybody is talking about, just the two, one on the yoke and one on the side of case?? Is there a fuse on one of the boards I need to look for in case that is all it is, a blown fuse? If it's not a fuse problem, which one of the monitor boards usually ends up being the culprit??
I understand that caps go bad on boards so if it's not a fuse problem, I would like to take off what ever board or boards I need to remove and have them fixed at a local TV repair shop I use.

If anyone out there has had this problem with their Odyssey or if there is anyone who could guide me on steps to take to get this fixed I would very much appreciate your help.
We Love the Odyssey and it is in absolute mint shape with Topper and would like to keep it running for the family to use.
Thanks 
Clint

[robertwinter]

Yes, the monitor boards consists of the neck board and the main board mounted on the left of the chassis.  The fuse is located on the bottom of the main board.

The problem usually lies on the main board, most likely the flyback.

[hwy111]

Thanks Robert.
I've actually spoken to you before on this problem a while back and I got so busy with life and frustrated with the Odyssey, that I never did anything about it till now.....got tired of seeing the thing just sitting not working.....we all know that's a shame. LOL!

I hooked up an lcd monitor to the video card like you previously said to do and it does show video running just perfect so that eliminated the electronics box. The only error code I have now is 1102 (player tracking) don't know why, never had that before along with a constant low level beeping. I have no clue where the beeping is coming from....I've tried to listen everywhere to locate it. You told me that it may be coming from a failed monitor board...I hope so because it's annoying.

So I guess you're right from the get go about the problem lying in a monitor board. Do I have to remove the monitor to take out this main board or is it possible to remove it from the top? How many screws does it have? If I leave the machine unplugged for a week or so, shouldn't the energy have dissapated by then so I could remove it safely without getting accidently zapped or is it possible to remove it safely without waiting......rubber gloves maybe
Also, once I find a replacement board or have mine repaired, is it just simply putting the new board in or does the new board/monitor have to be tweeked?

Thanks,
Clint

[robertwinter]

You have to pull the entire monitor to remove those boards.  There are two screws at the top and one on the bottom left.  You'll also need to remove the coin guard on the bottom right.

Removing the monitor chassis -
http://www.robertwinter.com/slot/odyssey/docs/02_Service_and_Replacement_Basics.pdf (page 2-16)

Removing the boards -
http://www.robertwinter.com/slot/odyssey/docs/09_Component_Replacement_Display.pdf

I'm no expert, but I would leave it unplugged for a week before you remove it and I would still discharge the tube.  I've been zapped by tubes before (was a newbie at the time) and it ain't fun.

Robert