I had a similar (maybe lightning) problem with a QCX+5W.? ?In that case I replaced the Si 5351 A-B-G? several times as well as the QCX demodulator chip (you don't have)? without getting it going.? ?
I wondered if the first 2 5351A B GT 's? were miss sold pre-programmed ones so tried one from another source.? I used my spare CPU chip too the third time of praying and it all worked again.? I've not swapped the CPU back yet but suppose I ought to get round to it.??
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The chip that definitely did work was?
Bruce Akhurst