I left the EAP660 connected to the PoE switch. First I didn't notice, but now the blue LED blinks periodically. It stays on for ~40 seconds. Then turns off for 1 second. Then 40 seconds on, 1 second...

@Virgo I came to the same conclusion. Warranty won't be possible. Although it has lifetime warranty, I can't apply for a replacement because I bought the unit second hand. It'll be recycled. For what...

@MR.S Just tried, but doens't work. There doesn't seem any network connection possible. Plugging in the UTP cable into my computer doesn't light up the LED on the LAN port. The EAP behaves the same...

I can't access the AP. It doesn't broadcast the SSID's to connect to it wireless. After my (several) resets, it should broadcast the default TP link 2,4Ghz and 5Ghz SSID's, correct?

@MR.S Thanks for your suggestion. I've connected it with a 5m and 1m UTP cable directly to the switch to test it, with the same result. Other EAP works fine with both cables.

I've two EAP660HD V1 access points. One of them doesn't seem to startup anymore. If I connect it to the PoE port of my SG2008P switch, only the PoE LED will light up. The link/activity LED of the...