Here's the common denominator, both TIU's were successfully upgraded to the 5.0 software last year and I never tried loading an engine because I was dismantling my old layout. Is there a possible problem that I am not aware of?
No, DCS 5.0 is absolutely not the culprit. Much more likely is a loose transceiver board in the TIU or the remote. This could have happened when you took the TIU and remote off the layout for upgrading and handled them differently than you do through normal use.
Connect the TIU's Remote Input port to the base of the remote with a 4-conductor (curly) telephone handset cord and see if things improve. If they do, we can proceed from there.
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