TL-WPA4221 KIT V4 do not work without reason
hello everyone, since yesterday my powerlines have stopped working, I have changed the eth cables, I have reset the devices several times, I have updated the firmware to the latest version through the tp-link software for win10, I have performed the mating but all unsuccessful. Yesterday as soon as I pressed the reset button with the toothpick they returned to work but unfortunately only for 5 minutes, then again the total nothing. I tried the powerline that my sister uses and with my pc they work perfectly in fact I am writing to you from the pc connected with my sister's powerline. The powerline tp-links that now do not work have always given disconnection problems in wifi despite having set static IP both on the router and on the device but nothing to do, but now it does not work either with cable or in wifi. Internet unavailable is the error. In my opinion something is broken, in this case since I bought them in the store not even 6 months ago I think, is it possible to have them replaced by tp-link itself? because I no longer have the purchase receipt and at the shop I don't think they will change them anymore.
Thank you all for any replies.