It’s a good sign if your VDB770 can stream and is booting up on the new power supply. To address the web browser concern, what browser are you using? Have you tried a different browser? Does the issue occur the same way on an alternate browser?
Guides for installation, pairing to your account, and setting up recording rules for a new VDB770 are found below. Additional links to troubleshooting and other related guides for the VDB770 are available at the bottom of the install guide.
If you are swapping the ADC-VDB770 for a new one, first delete the old camera under Video > Settings > Video Device Info and allow 5-10 minutes for it to clear from the account fully.