If no lights then likely it's faulty. Return to place of purchase. I had 1 out of 6 TP-PA9020P do this.

There is a wake-up fix to disable power saving in the stickies at the top of the forum. Sounds like might be your issue....

This thread doesn't show when searching for TL-TP9020 or TL-TP9020P so hopefully it will now! I just created a new thread about firmware versions for these devices....

Model : Hardware Version : Firmware Version : ISP : Guys, I have had regular intermittent disconnect problems using 6 x TL9020P adaptors in my house, especially if used together with any older 1200...