[Elecraft] Always Flashing TX on K3S on power up

[Brian Moran]

I'm getting an always-flashing TX on the LCD about 3 seconds after I power up our K3S; I'm running  firmware 5.50 (though it was happening with 5.38). There are no "PTT ERR" or "KEY ERR" messages displayed on power up.

The ONLY connections on the rear panel are Antenna and Power -- Nothing plugged into USB, Nothing into ACC, Nothing plugged into PTT. The Config: PTT-KEY is set to Off/Off. 

There is nothing plugged into the mic jack on the front panel.
Pressing the Test button on the front panel doesn't clear this mode to NORM. It doesn't matter what mode the radio is in, the LCD TX indicator just keeps flashing.

Anyone have any ideas ?
I will call Elecraft tomorrow, but thought perhaps someone would recognize this ...Thanks!-Brian N9ADG