Likely not a warranty issue due to the excessive voltage presented to the LNBF. The signal passing issues on this port would point to polarity switching IC damage. I will be unable to test until the end of October, so give me call tomorrow and I can offer a possible replacement option.
Be sure not to connect a two port LNB(F) until this is resolved.
I guess I'm lucky then that all I apparently lost to this was one port of a $49 dollar LNBF before I lost a bunch of other things.
I've got 2 other DRO dual LNBF's available, several DRO singles, and an orthomode dual c-band feed, with Norsat 8115's I can install with a powered switch when that time comes, IF I can ever resolve the stray voltage issue that is. Plus, this C2W-PLL seems to be working perfectly for now on just the 'good' port hooked to the MicroHD, with the bad port just floating, so I'll just leave that up for now as-is, and keep the second sat receiver disconnected completely while trying some other things to resolve the voltage issue.
UPDATE:
Ok, wife gave up the tv set. I moved it's 3-prong grounded plug from the common 6-way outlet that was plugged into the UPS, into a wall outlet all by itself, but it's the upper one on the same wall outlet the UPS is plugged into. I did this in hopes that it would ground out the stray voltage, thinking possibly the 6-way internal ground was floating.
It made no difference, maybe that ground prong on the tv set isn't even connected inside? The stray LNB voltage still couples through the HDMI ports...
That's it for me. I'm not going to take the time to open up all these devices, and attempt to ground-bond all the various boards in them all together in the hopes it'll cure this issue. I'll just keep the Amiko as a spare for now, and keep using the MicroHD for its most
excellent dvr capabilities! Brian, you knocked it out of the park getting those added to the firmware, and I certainly appreciated it all these years! Even the last few years I didn't think a sat dish would work at this new house, I still had the MicroHD connected to watch dvr'ed shows! I got all those Laurel & Hardy's and Little Rascals recorded from Metv Alternate way back in 2012/2013 when they were showing them on Sunday mornings...