[Elecraft] K3: RX dead, need help

[DM4iM]

Guys, i need your advice. At our Clubstation, while i was on 40m with
the K3 and a Dipole, another guy transmitted with the 2nd setup, a
TS-850 / TL 922 / vertical-ant on 80m.
I saw a HI RFI flashing and the rx went deaf. Resetting the K3 did not
help, also shorting out the gas-discharge diode on the KANT3-board.
The RX sounds like there is no antenna connected, there is noise, but no
signals. Help!

Martin
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73, DM4iM
K2 #2706