Archive for the ‘SunA Electronics’ Category

Goindol

Monday, November 21st, 2005

Problem: Board boots but does not complete POST. Halts with some on screen garbage displaying BAD ROM 5 on more often than not. ROMs were clearly marked on the board, so I yanked ROM 5, read it and ran it through ROMCMP. It came up as unknown. Sounds bad to me!

Located a replacement ROM image and burned to a new EPROM (uh, after finding a replacement EPROM that would erase and burn correctly – that took a good hour and change). Verified the new EPROM was correct, loaded it into the game and…

BAD ROM 5

OK… I pull the board and start a visual inspection. Notice a section of the board with about 5 or 6 scratched traces. Two of them are broken (no continuity). Jumped them with some wire-wrap wire and the board comes right up! I do not yet have a way to test inputs yet, though…

Solution: Reburned ROM 5, jumped two broken traces. (Inputs unknown.)