I've been having this issue for several weeks now. The router just randomly disconnects from the internet. It usually will come back on in a few minutes, but last night it lost the connection, then came back on for a short while, then disconnected again. I was on the phone with tech support from my ISP and they ran a line and modem check. I plugged the computer directly into the modem and internet was fine. I disconnected everything last night and plugged everything back in this morning and the router is up and running again. I've no idea why the router is just randomly disconnecting. It seems to happens mostly at night after 9 PM (??)