[Kenwood] Kenwood TS440s Transmit Problem

[L P]

I am running a Kenwood TS440s . The radio will not transmit on 20, 17, and 15 meter bands in Sideband mode(10.5mhz - 21.999Mhz). Internal antenna tuner does not work on these bands as well. The on-air light will illuminate for one second and then go out. The radio transmits and tuner works normally on 80, 40, 60, 12, and 10 meter bands. Tried several different antennas  with no difference.  Any ideas!


Larry
K5DNA