poe errors

Has anyone else had an issue with a D-Link DGS-1510 PoE switch where the PoE stops working for no obvious reason but the switch is otherwise fine? A full factory reset doesn't cure the issue. I have a unit that D-Link won't RMA because I have no proof of purchase, so I'm wondering if anyone...

I bought a used ICX-6610 from eBay but it turns out the PoE board was shot (had a hole in an IC and a blown transistor on the PoE board). Despite this, I was able to update the firmware and image and PoE firmware but the error persisted and of course the error blocked the output of commands...