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CRT monitor whine; what causes it, ways to mitigate it, do some display types suffer from it more than others?

I can't really notice it myself having lost that range of hearing year ago, but my kids tell me that my CGA monitor is MUCH louder/more annoying than the handful of VGA crts I've been tinkering with. Is CGA more likely to be noisy in this way than VGA/EGA/etc? Is there anything that can be done to …

Re: Tandy Nano - 3 Voice Soundcard ISA - Lowprofile

OK so it IS working, it's just EXTRAORDINARILY quiet compared to the Pearce board. I pulled the PIC completely and I can barely hear the default SN76489 noise and music playing with speakers turned all the way up, which is ear-splitting when using the Pearce board. Maybe the variable resistor …

Re: Tandy Nano - 3 Voice Soundcard ISA - Lowprofile

OK so it IS working, it's just EXTRAORDINARILY quiet compared to the Pearce board. I pulled the PIC completely and I can barely hear the default SN76489 noise and music playing with speakers turned all the way up, which is ear-splitting when using the Pearce board. Maybe the variable resistor thingy …

Re: Tandy Nano - 3 Voice Soundcard ISA - Lowprofile

I've finally put one of these together and I can't get any audio from it. My early prototype Pearce tandy sound card works fine but this is just dead silent. Is it possible the little PIC controller wasn't programmed? Is there a TSR to unmute it or something? *edit* I realized my programmer can read …

Re: Troubleshooting 1000SL: Power supply runs when not connected to motherboard, no PSU activity when connected to boar

Looks like your advice was spot on. Audio daughtercard C20 appears to be shorted, and sl boots fine with daughtercard removed! Interestingly, it looks like someone rebuilt the audio daughtercard at some point in the past and not very well, so I think they knew there was a problem with it of some …

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