Hi all,
I've been getting an annoying sound glitch on my IJ, randomly during a game the music will go off, but the sound effects will continue at maximum volume, so loud you have to switch it off. Reboot and it's fine again for a few games.
I did try reseating the ribbon connectors, but afterwards couldn't get the cpu to boot. Following the pinwiki repair guide advice I isolated this to the sound board as disconnecting just this ribbon cable allowed the pin to boot up. Took all the sound chips in and back out and this solved the booting up problem.
But the original sound problem is still there, happened again on first game. Did notice that there is blue residue or corrosion on the chips sockets on the sound board, I've seen this many times on fruit machine boards where the batteries have leaked, usually the source of a lot of problems. Also the cpu is a pinled so maybe the original was replaced due to battery leakage? The sound chips are quite a way from the cpu so is this likely?
Anyone else experienced this sound problem? Corrupted sound Rom maybe? I could burn a new rom but it's been a while I've got to find my old eprom burner first and see if it still works.
I've been getting an annoying sound glitch on my IJ, randomly during a game the music will go off, but the sound effects will continue at maximum volume, so loud you have to switch it off. Reboot and it's fine again for a few games.
I did try reseating the ribbon connectors, but afterwards couldn't get the cpu to boot. Following the pinwiki repair guide advice I isolated this to the sound board as disconnecting just this ribbon cable allowed the pin to boot up. Took all the sound chips in and back out and this solved the booting up problem.
But the original sound problem is still there, happened again on first game. Did notice that there is blue residue or corrosion on the chips sockets on the sound board, I've seen this many times on fruit machine boards where the batteries have leaked, usually the source of a lot of problems. Also the cpu is a pinled so maybe the original was replaced due to battery leakage? The sound chips are quite a way from the cpu so is this likely?
Anyone else experienced this sound problem? Corrupted sound Rom maybe? I could burn a new rom but it's been a while I've got to find my old eprom burner first and see if it still works.