You might try a drop of Deoxit on the plug and then insert and remove several times Paula.  I've had to do that with my K2 a couple of times.

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/24/2019 3:05 PM, Paula Uscian wrote:
  Thanks to the many people who responded to my post, it is much appreciated. I 
was thinking Joe's recommendation below was my last option. But then a strange 
thing happened.
In doing some last checks before exploratory surgery on the K3's IO board, I 
decided to unplug the Phones jack of my Radiosport headset from the front of 
the rig and plug it into the phones jack on the TASCAM to confirm that I was 
hearing tones on TX. I did hear the tones (as I had before with the phones 
plugged into the K3 and listening via the K3 monitor). But after I plugged the 
Radiosport phone plug back into the K3, voila -- I have a reading on the ALC 
meter.
Of perhaps greater significance, I verified operation is now fine by completing 
a Q on FT8.
I also now have TX for RTTY as well.
I'd like to think I'm home free due to clean living ;-), but fear I may have a 
dreaded intermittent issue. Time will tell.
Many tnx agn to all who responded, your comments were most helpful. For 
completeness of this thread, I've included responses to some of the 
recommendations and questions below.
73 Paula k9ir


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