First post, by YesAffinity
I bought this card knowing it potentially had issues. I replaced electrolytic caps and the TDA1521 audio amp.
It has a TL084BC between YAC512 and TDA1521. I had read that the TL0* is incorrect from the factory in some instances, and should be a TL074. I replaced the TL084 with a TL074 with no improvement, so put it back to original.
Sound effects were problematic from the start, and now are non-existent.
I put a PII 440LX test rig together for purposes of troubleshooting this card further. The only things in it are the CPU, 64MB of SDRAM, a Trident 9750 AGP card and the sound card. It's a DELL motherboard, so no overclock options. Also with a fresh install of DOS 6.22 (from phil's) on a 2GB CF.
Attached are the results in Jan Knipperts drivers. I have tried all available IRQ's and SB DSP options, and get the same result no matter what. If I go into mixer, FM Synth plays fine, Sample produces nothing. In Doom, music plays fine, no sound effects.
I'm trying to hone in on where to start probing, hoping I can find a faulty component to replace and get this card working 100% again. I'm not afraid to throw hot air at it, should the 82c929 need replacement.
Hoping someone can point me in the general direction of where to start probing.