> I can attest to Michael's statements that these can be a real pain when not working. He has been a big help to me lately with one of these SDS9 units as well. After having replaced all the caps on the board, not just the demux ones, I am back to square one as well. My next step is IC replacement, and hopefully it gets mine working again soon.
Any particular reason why you replaced the all the capacitors? Were they ∗all∗ faulty?
Don't just start ripping parts out and replacing them, without having some idea of why or whether or not it's likely to cause the symptoms you have. You've probably generated more faults than you had to begin with now...
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Gordonjcp MM0YEQ