cyclone3d wrote on 2018-12-02, 08:01:
I have figured out what the problem is with the AW744-L2 card and the HP T5720 thin client.
It is PCI bus noise.
Fully populating the capacitor places on the PCI riser card completely fixes the issue. I am guessing this will also fix issues with "compatibility" with other cards as well. It should also significantly clear up the audio output if you are using a different sound card.
So, I'm in the same boat here with my Fujitsu Futro S300. Neither my "Creative" CT4810 (AudioPCI) nor my AW840 / CMI8738/PCI-SX want to work with it (both cards are known good - actually the Creative DOS drivers init the card and upload the wavetable sample ROM sucessfully, but no sound output is to be heard. The CMI card just plain won't initialize.)
Fortunately the solder pads & holes are all nice and clean, but unfortunately, there's no published values for the caps anywhere. This is the riser:
The part # on the riser is 736TR3230K100, incidentally, not that that helps much.
How can I determine the values of the needed caps? Anyone want to take an educated guess?
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