[Elecraft] Debug LINE IN problem

[w3sb]

Hello,

After successfully working VP6D FT8 F/H on two bands, I shut down the station for a few days and when I powered everything back up, I don't have any transmit tones on FT8. The rig goes into transmit but there is no RF output. I also tried other digital modes that have worked previously (Digipan and FLdigi) with no luck. I checked my mechanical connections, cables and K3 settings (LINE=35, MIC SEL=LINE IN) and all seems OK. I'm using WSJT-X version 1.9.1. My fundamental question is where to start on debugging a LINE IN problem? I should mention that the rig interface is a microHAM microKEYER (worked Z23MD on FSK so that part works).

Suggestions?

73, Monty W3SB at ptd.net