Neo Geo MVS U4: Toei TC RM251S Blacking Out

nerdygrrl

Well-known member
Joined
Dec 24, 2010
Messages
3,329
Reaction score
495
Location
Portland, Maine
Update: I have isolated this issue to the monitor. The previous owner mentioned that the RGB cable would come off whenever it was moved and it would play blind which is essentially what it is doing now on and off. When I picked it up we rolled it down the dway and into the car where it sat for an hour plus ride and it never came off. I have also found it to be fastened quite well when I have gone to remove it to look at the monitor. I doubt it would fall off from being moved. I am thinking he assumed the lost picture was a result of this and reset the harness and voila picture. This has happened to me on three separate occasions.

My guess is there may be a short somewhere or possibly a broken solder joint that has gotten worse with time. Since narrowing down the problem to the monitor I noted two things:

1. When I touched the screen to see if the monitor was still on I got the static surge which briefly brought the image back-like split second.

2. When closing the CP the 'force' also brought the screen image back briefly

Perhaps I am barking up the wrong tree with the short or bad solder joint. I may just make a new RGB harness tomorrow to see how that goes.

What do you guys think? What would cause a seemingly perfect monitor to go black?


Has anyone else had any kind of issue like this before. Here is a video from yesterday: http://www.youtube.com/watch?v=V4Emz800wg0&feature=plcp
 
Last edited:
First thing I'd be doing is cutting that RGB connector off and installing a new one. Assuming it is a similar connector to what the WG monitors use they are a standard part and any decent electronics shop will stock them.
 
First thing I'd be doing is cutting that RGB connector off and installing a new one. Assuming it is a similar connector to what the WG monitors use they are a standard part and any decent electronics shop will stock them.

It's a little different more like a Sanyo EZ0.

I plan on pulling the chassis out on Sunday and looking everything over. It just sucks I went into this thinking "board problem" because that is what the previous owner said only to find out 12+ hours in that it's the monitor or possibly both. The monitor parts are not easy to come by and I have yet to find a schematic.
 
Well theres obivously an issue with one of the slots on the board, but I'm pretty confident that the monitor will be fine if you put a new connector on it. I wouldn't pull the chassis without trying that first.
 
Back
Top Bottom