[Elecraft] K2 - hang up problem

[N2TK]

Before I tear into the K2 to find  out what happened today I figured I would
ask on here in case someone has seen this  problem before.

It receives fine on all bands. When I transmit (does not matter what power
level or what band) it hangs up. If I keep it on the transmit mode power out
is fine. If I let it go back to the receive mode the receive signals are
very, very weak. If I talk into the mike, there is no power out and I have
side tone in the headset so I can listen to my transmit audio.
To correct this problem I need to change bands or shut off then on the
radio. 

Anyone hear of this problem before?

Tnx for any ideas before I pull out the schematics and take off the covers.

73,
N2TK, Tony