Gun smoke freeze?

[r67055]

Hello.
there is a gun smoke pcb that shows a white image after switching on. It is remarkable that the body gives a picture in a standing position, but it looks as if it has frozen. I don't know how to work correctly in the chin of the body. Can you help me?
Thanks

 

[Ape Cosplay]

Hi,
try flipping all dipswitches OFF.

 

[r67055]

Hi,
try flipping all dipswitches OFF.

If all the switches are off, the second image is shown. White striped screen.
The RAM next to the main Cpu Eproms is GOOD. I tested it.

 

[caius]

Check the ribbon cables and connectors, I experienced the same issue on my board.

 

[r67055]

Check the ribbon cables and connectors, I experienced the same issue on my board.

this is what i used.tested on a test table. not in a cabinet

 

[Asure]

Are you sure the game is running at proper+5V/5.1?

The board interconnectors, as Caius mentions, they are the little ribbon grey flat cables between the boards, that's what you should check.

 

[r67055]

Are you sure the game is running at proper+5V/5.1?

The board interconnectors, as Caius mentions, they are the little ribbon grey flat cables between the boards, that's what you should check.

I measure 5.1V in the tank. I replaced the gray connector with a reliable working one. The screen has not changed.

 

[caius]

this is what i used.tested on a test table. not in a cabinet

I meant the ribbon cables and the connectors that interconnect the two boards.

 

[r67055]

I meant the ribbon cables and the connectors that interconnect the two boards.

Yes. me too. I also have a bootleg pcb. That works. I replaced it with that

 

[r67055]

Yes. me too. I also have a bootleg pcb. That works. I replaced it with that

bootleg does that. Is it possible that for some reason it cannot test the ram and freezes?

 

[r67055]

With the help of the bootleg pcb, I found out that the error is in the lower pcb. I'm thinking of a RAM error.