Never experienced this before and I can't work out why it would happen.
I got disconnected just now while playing on the PS3 but noticed all the lights on my router and modem were still on (up/download lights weren't flashing though).
Went to the PC, turned the monitor on to check if i had connection on there to find it had locked up while on the desktop 5 mins ago. As soon as I turned it off all my devices in the house regained connection and the lights on upload/download started flashing again.
I don't even know how to troubleshoot it or what to type into google to even find a solution.
Using an Asus RT-N56U + Virgin Superhub 2 (modem mode only)
I got disconnected just now while playing on the PS3 but noticed all the lights on my router and modem were still on (up/download lights weren't flashing though).
Went to the PC, turned the monitor on to check if i had connection on there to find it had locked up while on the desktop 5 mins ago. As soon as I turned it off all my devices in the house regained connection and the lights on upload/download started flashing again.
I don't even know how to troubleshoot it or what to type into google to even find a solution.

Using an Asus RT-N56U + Virgin Superhub 2 (modem mode only)