Donkey Kong monitor white lines

aboy1411

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Im a noob to all of this. I just bought my first cabinet game. Its donkey kong. The main problem that I have with it is that it has horizontal white lines. See attached pic. The pic is blurry for some reason. The largest white line is at the bottom and they get smaller as they go up the screen. There are about seven of them. I don't know what is causing this. I know one of you guys will. Thanks for your help.
 

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It looks like I have the sanyo 20 ez. There are a few things that are a little different but I think that is it. I know for sure it is a sanyo monitor. Is it somewhat easy to replace that stuff? I have an electrical license so im pretty good with wires and my hands. Like I said I am new at this. There is also some screen burn in that you can see when it is turned off. Does this matter at all? Thanks
 
mine looked the same way when i got it. i pulled all of the socketed roms from the pcb cleaned and reseated all of them. ALL lines where gone with some fine tuning my monitor looks new. but i never could have done it without all the help i got from everyone here.
 
yes, just pull the board out. not the monitor.

It's been a while since I've done one but I do believe you must remove the monitor in it's entirety because it's next to impossible to remove the screws holding the HV cage in place. Am I remembering this correctly?
 
Not sure if that's a cap kit, aren't the jail bars going the wrong way?

The picture looks horribly out of focus too.

Did you try adjusting that out? Did you adjust all the pots? There is a brightness (screen) on the cage where the flyback is (two holes going to two knobs on the back, one is screen the other is focus), a brightness pot by the volume knob and then a sub-brightness on the chassis. Try to adjust everything first and see what the best picture you can get is.

Yes, if it is an original DK it most likely a Sanyo 20EZ.

If you're going to cap the monitor, pull the whole monitor out and put it on the table then remove the chassis. It's not hard at all.

If you are going to reseat chips, then unplug all the little connectors from the PCB stack and pull the PCB out of the machine and set it on a table.
 
I got a better pic of it. I don't think its a focus problem that seems ok. And no they are not the standard jail bars. The lines on mine are horizontal. Let me know what you think. Please remember I am new to all this vocabulary. Thanks
 

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I have never seen that before. Eek.

You check the voltages coming out of the outlet on the bottom of the cabinet that is supplying the monitor? Should be 100v.

If it has original caps still, I would at least start there.

You could have a bum tube too. But I am just guessing.

If it was me, I would at least cap it and see what happens.
 
If the caps are original I'd definitely start by recapping. Make sure you get the main filter cap as well, since they're starting to fail and most kits do not include this cap.

But that doesn't look like a monitor issue - it looks like a PCB issue. As mentioned before, reseat chips, check voltages.
 
like i said before it looks just like mine did. pull all roms reseat. this is what mine looked like. not the best pic but u get the idea.
 

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OK. Im gonna try doing what pac says. Pull and reseat all roms. It's free and don't have to wait for parts. Going to do it in the next few hours. Ill keep you posted. Thanks again
 
couldn't you just unplug the video signal or unplug the harnesses from the game board to rule out the monitor?

looks like a PCB issue though. with a 2 board or 4 board set, couldn't there be a board connection thing that would cause this, or is this strictly a rom thing?
 
I just unplugged the video signal and the horizontal bars are still there. Does that mean its not the pcb roms? I have adjusted all the knobs (vertical, brightnesss, etc). What do you think?
 
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I just unplugged the video signal and the horizontal bars are still there. Dose that mean its not the pcb roms? I have adjusted all the knobs (vertical, brightnesss, etc). What do you think?

It sure looks and sounds like a monitor issue to me.
 
Not sure if that's a cap kit, aren't the jail bars going the wrong way?

They look like they're going the right way to me... they're horizontal on a vertical screen, so they're vertical bars if the monitor is rotated horizontally. I'd definitely recap the monitor... that's almost certainly a monitor problem, and very likely caps (plus those monitors are notorious for needing cap kits).

DogP
 
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