street fighter EX plus - just FX

[TheBortot]

hi, got a street fighter ex plus with just FX, no background music. Tried monaural first directly from jamma to a tv, using a conversor( to video component). Next, tried to use the Q sound making some RCAs to tv. Got the same problem.

 

[TheBortot]

now i fucked up. got distracted and switched the key ``stereo->mono`` while the pcb was on. Now i got this:
https://ibb.co/gsiUJG

``ERROR B930``.

 

[TheBortot]

magically it came back to life... with the old problem! Hm, i thought about plugging -5v, but didn`t make it, because i`ve found a ex2 plus manual - it didn`t even mention the -5v.

 

[xodaraP]

Error B930 is "Unable to find program ROM" - I had a board doing this recently and originally thought it was a BIOS fault, but I found a bad mask ROM and a dodgy connection on the solder jumpers on the board and that fixed it

I'd guess you had a mask ROM fault and possibly still do, but for whatever reason it's decided to start working again, maybe reseat your ROMs and ROM board onto your motherboard

I don't think the ZN boards use -5v

 

[TheBortot]

found a broken leg on ``sf 03`` CI and fixed it. Thx, working great again!