@Beezer Yes - the problem was passive POE. Attached to a POE switch it works fine.

@Philbert thanks for the thoughts but I think I've exhausted all the tests I can try so will return it as a DOA.

When plugging in the eap225 wall plate to a poe cable the led light does not flash (or do anything). I already have an eap225 outdoor and an eap225 ceiling working okay and have tried plugging this...