@BunnyBuzzer What is the bandwidth you paid for your ISP? From the picture, the powerline link rate between the 2 devices is 49Mbps only, while this device is TL-PA8030KIT, which is AV1300 units; And...

@Timneedshelp The default wifi password is printed on the back panel, which is 8 digits numbers. Except the troubleshooting you have done, try to use the tpPLC utility to reach the wireless password;...

@Rien Definitely sure. Take your time to do that. Any updates, please let us know.

@PaulV You are welcome; you can go for powerline adapters and take some time to test its performance. If need any further help, please let us know. Best regards.

@Josh71114 Try to change another web browser, clear the browser cache to give it a shot. Still the same, please hard reset it by holding the reset hole for 1s with it powered on. Then use the admin...

@nard007 Hello, cause the TL-WR850N is a customized device based on ISP's specific requests, it is suggested to contact the ISP to get it first.