Blue line on Sanyo 20EZ monitor / VS cab help

doesbenfoldfive

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Just put in a new refurbished chassis into my VS. Dr. Mario cab.

When I power on...
-The monitor shows a small blue line on the middle left, every once in a while it blinks a long blue line across the whole screen.
-The coin counter just keeps clicking and adding credits at a fast but unsteady rate.

What is happening?
 
You can see the line in the middle of the left side.

1GTDe.jpg
 
Did you verify that the monitor chassis service switch isn't flipped? I believe that cuts off vertical deflection. It's SW301:

SanyoBoardControls.jpg


DogP
 
I'm an idiot. The switch was on.

So now the monitor lights up. But nothing comes up. No sound either.

Coin counter still counts up. I can unplug the wires going to it to make it stop.
 
Clean the pins on the board that plugs in? What do I use?

The game worked when I got it. I plugged the JB/JC in backwards and fried the main board. Bought a new working one. Did that also fry the Dr. Mario board?
 
I'm not familiar with the damage caused by a JB/JC swap, but it looks like it sends 130V back to the main PCB on the audio output. That's definitely gonna blow up something, but possibly just some resistors and maybe the LM3900s at the output of the board. It could hit whatever power rail those amps are on as well though, which may get through to the Dr. Mario board. Or there could just be a problem with the new board.

Have you tried the old board? If it just blew the audio section, you'd still get a picture. If more of the board is damaged, then I'd say it's very possible that the Dr. Mario board got hit too.

DogP
 
Both do the same. Nothing on the screen and when the dr mario board is plugged in, the coin counter keeps counting up.

I'm not familiar with the damage caused by a JB/JC swap, but it looks like it sends 130V back to the main PCB on the audio output. That's definitely gonna blow up something, but possibly just some resistors and maybe the LM3900s at the output of the board. It could hit whatever power rail those amps are on as well though, which may get through to the Dr. Mario board. Or there could just be a problem with the new board.

Have you tried the old board? If it just blew the audio section, you'd still get a picture. If more of the board is damaged, then I'd say it's very possible that the Dr. Mario board got hit too.

DogP
 
Are you sure you've got the Dr. Mario board plugged in right? You can accidentally not only put it on the wrong side, but I'm pretty sure you can plug it in backwards as well.

After that, yeah, I'd suspect you've probably got problems on that Dr. Mario daughterboard, which would really suck.
 
It's plugged into the top of the main board. If I flipped it over, it wouldn't slide back into the cage...

I wish I knew where another vs cab was locally so I could go test my boards. Hell, id even ship it to someone to test them.
 
Any ideas? When the Dr Mario board is plugged in, no sound/plain lit up screen/coin counter keeps counting up. When the board isn't plugged into the main board, no sound/no screen/no coin counting up.
 
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