The av600 in my shed has stopped working, the power line light is off The electricity in the shed is working fine, have tried every type of reset, did not work. Replaced with a known working av600 sti

I have a powerline setup with 4 x TL-WPA4220 when checking status using tpPLC i can see two of the connections dropping in and out. When i ping the affacted TL-WPA4220 from the router i dont see any i