My TiVo6 box will not start up. The starting up message is on the tv but nothing is happening. The light on the TiVo box keeps flashing between white and red. I have run the VM tests but, surprise surprise, they report no fault found. I have powered the box on and off a couple of times with at least a minute between power off and on, no change. Internet access is fine, I can access tv stations on the tv through the internet so tv is ok. Any suggestions.