If it is intermittent, then check for the KPA3A not being seated all the
way down (pull Fan panel, 4 screws and inspect).
Or it could be the relay on the KPAIO3A riser board. To confirm; click
above and below 12W a bunch of times, if occasionally the RX comes and
goes, it is that relay.
Components on the KPA3A can make the RX poor, but usually when they
fail, they are not intermittent.
If you send it in, I will make sure it has the current Revisions of the
LPA and KPA. There are new ones since your rig was here in Jan 2017.
Keith WE6R
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