You can try to reset it by pressing the reset button for 10 seconds, and see what happen, if still abnormal led lights, make sure you are using the original power adapter, if yes, you can contact...

The default password should be 8 digit numbers or characters, you may need to double confirm it.

Hi MikeH, You can go to network, and then click on modify, there should be another advanced on your page, click on that, you will find using the following DNS , you can change it there.

Hi Vin, You can check if the firmware for this router is latest or not, if it's not the latest, you can try to upgrade the firwmare.

Hi Kevin, I find a FAQ on TP-Link website, you can try to check it for some help: https://www.tp-link.com/en/faq-2066.html Happy New Year!

I believe so ,but it's hard to tell, perhaps just didn't do the compatible test, cannot gurantee the performance