Hi @RobertCostigan
If you have a Power injector, then we can try powering the AP, so that we can isolate the Switch powering the AP.
Also, (I believe this is already tried) try removing the ethernet cable from the AP and wait for few minutes (This will completely remove any small amount of power in the board) and then try powering it up.
And if the APs are still not powering it up and replacement is the only option.
