[TenTec] Centurion is on the Fritz

[Richards]

Greetings... my Centurion died last night while I was Net Control of my 
favorite net, and more than embarrassing, it was frustrating to say the 
least.  I was running about 500 w and watching the Peak Power meter on 
the front, when it just stopped transmitting.   The rig keys it, and the 
transmit LED lights up, but it fails to transmit - not a single watt.  I 
get appropriate readings if I switch to standby.   This behavior is 
consistent with all three transceivers.    The result is the same using 
either PTT or QSK key lines - it switches to transmit mode, but there is 
no power output. This happens on all bands.

My best guess is my remote tuner took itself off line, and the amp saw 
high or low impedance/SWR.   I have an Elecraft W2 power meter that is 
SUPPOSED to break the key line whenever SWR exceeds 3:1, but I guess it 
failed to do that.

I have modest DIY sills and test equipment but I am game to try any 
diagnostic test within my skill level.  Any ideas?

Thanks for any assistance you can provide.
----------------------- K8JHR -----------------------