[ICOM] IC-746 High Indicated SWR on 6 Meters

[D C (Mac) Macdonald]

For some reason, the SWR function (and attendant
PA fold-back) seems to be wacko on my IC-746.  I
first thought I had an antenna problem, but that
proved not to be the case.  I have checked reflected
at ends of coax attached to antenna, the jumper to
an entry patch panel, jumper from that panel to a
coax antenna switch inside, coax from that switch
to the connector going to the transceiver, and  ALL
show VERY low reflected power.

When trying to transmit, SWR bar-graph on the 746
shows maximum.

Anybody have an idea or two as to possible cause?
The setup had previously worked just fine.

TIA & 73,

Mac, K2GKK/5
Oklahoma City, OK