Help me God please help
Look, I have no idea what my model number is or anything. But I just got a new link thing for my birthday (today). Says it's TL-WPA7517.
The whole wireless part of it works, which I didn't even know was part of it until I got it. However, the main reason why I got it, the Ethernet, isn't working. Well, sort of. It keeps connecting, Powerline on, then works for about four to five seconds, then switches itself off for a good twenty seconds.
See, it's telling me the issue is with the Powerline. And i was like "ok" and then changed the plug socket it was in. Both the one connected to my router AND the one connected to my PC. That didn't work. Retried the first socket i had in: didn't work. Waited 10 minutes before plugging in and re-pairing it: didn't work. I'm scared it's something wrong with the mains but the previous model I was using (TL-PA4010) worked perfectly fine 98% of the time. Though 2% of the time it also had the Powerline issue.
Please tell me how on earth to fix this because I'm extremely fed up, like a kid throwing a tantrum.

