Hi, Try this: https://www.tp-link.com/en/faq-2236.html I would say give another thought to flash third-party firmware which will void warranty.

It may be hardware issue if there is no auto reboot setup

Hi, Seems like your modem is for ISP. Do you see the question mark on the top right? Click it. I believe there will explaination of each operation mode.

TL-SG108 is a unmanaged switch. Are you sure there is web interface to log in?

Hi, C7 is just a router, while VR600 is modem router. So be careful what you choose. If you need to use phone line to get internet connection, VR600 then. VR600 is, to some extent, a high-end model....

No problem. Glad to hear that it works