Marvel vs Capcom Character select issue

Or, do you have another game to test in the cab? Do you get a glow from the screen with no image, or is the monitor not powering on at all?

If the answer to the second question is that it is not powering on at all, did something else get mistakenly disconnected when removing or replacing the game board?
 
Or, do you have another game to test in the cab? Do you get a glow from the screen with no image, or is the monitor not powering on at all?

If the answer to the second question is that it is not powering on at all, did something else get mistakenly disconnected when removing or replacing the game board?

The monitor is definitely coming on, it is just glowing black. I'm also getting no sound. I traced all of the wires from the jamma harness and nothing seems to have come loose during the removal. It was also suggested to me that it might be a ground issue, but I don't know how to test that?
 
Test continuity from all of the power lines to ground and make sure nothing is continuous from power to ground. Test all the power lines, to make sure they are reading at their normal values (i.e. +5V, +12V).

Make sure you are connecting the JAMMA connector in the right orientation. ;)
 
Test continuity from all of the power lines to ground and make sure nothing is continuous from power to ground. Test all the power lines, to make sure they are reading at their normal values (i.e. +5V, +12V).

Make sure you are connecting the JAMMA connector in the right orientation. ;)

I tested all of the power lines and everything looked good. I'm not sure I know how to test the continuity of the power lines though?
 
Assuming you're using a multimeter, there will be one setting on the dial for testing continuity.

It will look like the picture in this link:

https://learn.sparkfun.com/tutorials/how-to-use-a-multimeter/continuity

(and a detailed explanation there).

Touching one lead to any ground point and the other lead to any other ground or grounded point on the cabinet, whether harness or just a grounded part of the cabinet, should produce a beep. That confirms it is continuous. Touching one lead to one of the 5 volt pins on the JAMMA connector, and the other lead to another 5V pin on the JAMMA connector should produce a beep. Those should be continuous. 5V, or 12V, or -5V (if your cab has that) should not have continuity to ground.

There are ground pins on the JAMMA connector, the video chassis should be grounded, the coin door and other metal components should all be grounded. Anywhere you see a small green wire terminated at a bolt or a screw on a metal part, it is grounded (and again, all metal parts should be grounded...but that's more of an exercise in equipment grounding, and we are mostly concerned with any shorts that may be causing your blank screen).

Do your continuity testing with the power off. The rest of the info at that link echoes what I've just said, as well as giving some other good steps for checking voltages.
 
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Assuming you're using a multimeter, there will be one setting on the dial for testing continuity.

It will look like the picture in this link:

https://learn.sparkfun.com/tutorials/how-to-use-a-multimeter/continuity

(and a detailed explanation there).

Touching one lead to any ground point and the other lead to any other ground or grounded point on the cabinet, whether harness or just a grounded part of the cabinet, should produce a beep. That confirms it is continuous. Touching one lead to one of the 5 volt pins on the JAMMA connector, and the other lead to another 5V pin on the JAMMA connector should produce a beep. Those should be continuous. 5V, or 12V, or -5V (if your cab has that) should not have continuity to ground.

There are ground pins on the JAMMA connector, the video chassis should be grounded, the coin door and other metal components should all be grounded. Anywhere you see a small green wire terminated at a bolt or a screw on a metal part, it is grounded (and again, all metal parts should be grounded...but that's more of an exercise in equipment grounding, and we are mostly concerned with any shorts that may be causing your blank screen).

Do your continuity testing with the power off. The rest of the info at that link echoes what I've just said, as well as giving some other good steps for checking voltages.

Ok so after reading through the attached link and doing some more research I was able to test the continuity. When I tested 5v at the power source to the 5v pin on the jamma harness it was continuous. This was true of -5 and 12v as well. However, when I tested 5v at the jamma harness and ground at the power source I also got a continuous reading, which sounds like it should not be happening. I also tested the 5v at the harness and it read as continuous to the metal frame in the cabinet. WhI have it sounds like that should not be happening, correct? What should I be looking for to fix this? Is it possible I got some wires crossed while unhooking and rebooking up the game board??
 
Ok so after reading through the attached link and doing some more research I was able to test the continuity. When I tested 5v at the power source to the 5v pin on the jamma harness it was continuous. This was true of -5 and 12v as well. However, when I tested 5v at the jamma harness and ground at the power source I also got a continuous reading, which sounds like it should not be happening. I also tested the 5v at the harness and it read as continuous to the metal frame in the cabinet. WhI have it sounds like that should not be happening, correct? What should I be looking for to fix this? Is it possible I got some wires crossed while unhooking and rebooking up the game board??

Sounds like your 5v line is shorted to ground. Shouldn't be the case. I'd trace the wiring back to see if there is any frayed wiring or pinched wires that could be shorting to start.
 
Sounds like your 5v line is shorted to ground. Shouldn't be the case. I'd trace the wiring back to see if there is any frayed wiring or pinched wires that could be shorting to start.

I don't see any wiring that looks frayed at all. I unclipped all of the wires ties bundling them together to make sure nothing was pinched and I'm still getting a continuous reading. I've traced the 5v and the grounds all the way from the power supply to the jamma harness and can't see anywhere it is pinched or where it is exposed. I am getting more and more confused here.
 
Also, it's not just my 5v that is showing as continuous to the ground, I'm getting the same result with- 5v and 12v.
 
Firstly, I didn't see that you confirmed, but you are connecting the JAMMA connector to the game board in the correct orientation? If it's hooked up backwards, you will get a powered but blank/black screen.

Assuming that has been confirmed, start disconnecting all things connected to the power supply. Probably good to take pictures and/or video before you do, so you have something to refer back to when it's time to hook things back up. Connectors are typically keyed and unique, but not always. You want to make sure you get the same color lines hooked up in the same orientation/order, when re-connecting.

Disconnect the game board too.

Test at the PS, JAMMA harness, and game board. If it's isolated to the JAMMA harness, start testing the individual connectors that went to, but are now disconnected from, the power supply. That should get you to the line where it's occurring. Check the cabinet side of the JAMMA connector.

If someone has repaired lines and soldered them to the connector without protecting them after repairing (like with shrink tube), lines could be shorting at the cabinet side of the jamma connector.
 
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Well I found that one of the ground wires wasn't connected to the power source with a spade terminal like all of the other wires but was just stuck in there. After putting a terminal on there it seemed to help with the continuity issue. However... Once I turned it on after replacing the terminal I got a solid green screen... So it sounds like my board is dead after all, which is a bummer.
 
That sucks. Sorry to hear that. Time to get it phoenix'ed or take on the project of de-suiciding it.
 
I saw an older forum about people who phoenix boards but wasn't sure how current the info was. Any idea who would be the best person to send it to to have them phoenix the board? I want to make sure it's someone I can trust.
 
I got my only board to have died phoenix'ed by Razoola. Some information on the phoenix process and his contact info here: http://cps2shock.emu-france.info/suicide.html. Note that having him do it requires you to pull the chips that will be re-programmed, and he is in europe.

Not sure if there's anyone else that other members can recommend, that could offer the service.
 
I would rather not have to send it off to Europe to get it done. Hopefully someone on here can do it or knows someone who could. I should probably start a separate thread since this has nothing to do with the topic of this thread.
 
I just started browsing the Trading - New Products, Services, etc. area because I'd never been there before, and one of the first posts is a member offering CPS-2 resurrection service, either phoenix'ing or flashing the roms with decrypted data:

http://forums.arcade-museum.com/showthread.php?t=303771

The price looks extremely reasonable.

There might be some other members in there offering similar services.
 
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