[Elecraft] RS 232 connection failure

[Bob Jones]

Hi

my K2/100 Nr 5336 has fallen out with my PC - they've stopped talking  
to each other. I use microHAM's USB device router and a number of  
serial to USB adapters, all of which have worked fine until now. The  
same adapters work perfectly with my Icom rig but I get no response  
when the PC polls the K2. I use VQLog for general logging and  
Writelog for contests - neither will now work with the K2. Done the  
obvious stuff  - checking that the port is switched on at the K2 and  
checking all the connections on the DB9 adapter lead. I also use the  
KAT100 and have tried with it connected and disconnected - no  
difference.
Any ideas on where I can start looking for the fault would be very  
welcome.

73 Bob G3YIQ