Nintendo Mario Bros arcade missing characters

[hillbillypinball]

Hi i got a Nintendo Mario Bros arcade missing characters Some times when you first Turn it on There are there for a short time  I changed the Z80A and the  Z80A DMA It plays and the color is nice Just missing the Characters Any help would be great Thanks Hillbilly Pinball

[PL1]

Hi i got a Nintendo Mario Bros arcade missing characters Some times when you first Turn it on There are there for a short time  I changed the Z80A and the  Z80A DMA It plays and the color is nice Just missing the Characters

Intermittent missing sprites sounds like a problem with the graphics ROMs -- labeled gfx1 and gfx2 in the MAME XML entry.
https://www.gamesdatabase.org/mame-rom/mario

Sometimes there is corrosion between the legs of the ROM chips and the IC socket.

Try very carefully removing the ROM chips, cleaning the legs, and reseating them.

They are located at at 3F, 3J, 7M, 7N, 7P, 7S, 7T, and 7U on the TMA1-VIDEO PCB.
- See pages 22, 23, 28, 39, and 40 of the manual here.


Scott

[hillbillypinball]

Thanks Buddy I check all of them out

[hillbillypinball]

I got it Fixed Working great It was the 7074 Ram On the video board 3P Thanks for the help

[PL1]

Glad to assist.   


Scott