[Elecraft] K3S Sub Receiver stopped working

[KE8G]

Hi All,
I need some suggestions on where to start trouble shooting.  I looked at
Nabble and I have checked all that is listed there and no luck.

The sub receiver was working perfectly.  I took the radio apart to add some
new filters to the sub receiver.  It originally had two of them; configured
as 2.8Khz, then a 400Hz right next to it, and then 3 blank slots.  I
removed the 400Hz, the the filters are in the following order; 2.8Khz,
blank slot, 1.0Hz, 400Hz, and finally 250Hz in the 5th slot.

I used the K3 utility to configure them, with the appropriate settings for
each filter.

When using the radio, I have both the main and sub receiver on the Main
antenna.  If I tune to a strong signal on the band, using just the main
receiver, I hear on both sides of the headphones.  When I engage the sub
receiver, I still hear the signal in the left ear, but the right ear goes
to just white noise.

When the sub receiver is engaged, I can hear sounds in the left ear when
pushing any buttons on the radio.

I am somewhat stumped, as I was very diligent in disassembly and then
re-assembling it.  Using most current firmware, 5.66.

Please advise.
73 de Jim - KE8G