What we found on our OMD units.
The 8 screws that hold the module to the backing plate were loose. Oil had leaked into the electronics head and some seepage at the bellows seals.
Also, I am fairly certain that air was being sucked into the unit, thereby creating the condensation I was seeing on the back of the LED Lens.
We have not had an issue since we cleaned out the oil and tightened the screws. A Warning or two, but that’s it.