K3 frequency change by itself

barry NF1O

My K3 S/N mid 3K range with new synth modules and second RX and it just started changing its own frequency.

What i have noticed and tried.
 It tunes up the band slowly regardless of which way it was being tuned.
It starts at power on.
with or without logger running (N1MM)
with or without serial port connected
any band or mode
Only VFO A

Thats all i can think of at the moment.
Anyone seen and fixed this?

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