[Kenwood] ts850 transmit trouble.

[WW3S]

Not sure what happened; radio was working fb. Turned it on this morning, rx
ok but no transmit. It goes into transmit mode but absolutely no power out,
no alc and the swr seems infinite. It acts like the radio is seeing an open
and the limit circuitry is keeping the output nil. The auto tuner doesnt
work either....it trys to work but stops searching after a second or two.
Plugged the coas into my Icom 706 and it works fine; swr ok and power out
good.
Any ideas of where to start looking?