It can take some minutes before the starting up message disappears - how long have you left it? Also try after switching off both the V6 and the Hub and unplugging from power supply for 5 minutes. Switch Hub on and wait a few minutes until it is making network connections on other devices and then switch the V6 back on. It will go to starting up and remake network connections - leave it alone for half an hour and see if its worked.
If not, you could try the factory reset. Turn the V6 off with the " rocker "switch at the back of the box and unplug it for 5 minutes. Plug it in again. Then, hold the + and standby buttons (on the front of the V6) together simultaneously (press hard !) and then turn the box on with rocker switch, keep the buttons pressed, and wait till you see the welcome screen appear on the TV - then release the buttons. Be aware though it will erase all the data - such as all you recordings, and links, etc.
-------------------- John --------------------
My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.