I am having trouble getting my FIOS TV working and am becoming pretty frustrated with it. Hope someone can help out.
As far as the wiring goes i tested this just a few feet from the FIOS box which was installed just a year ago. I used the brand new FIOS splitter and tried others as well. I also used brand new wiring between the splitter and the STB and tried more than one new cable.
I use a lot of internet in the house and have never had any issues with the router going "inactive" and losing service.
Have had experience with this. Guide was showing up on every STB in the house but one. Ran through their tests, etc. and gave me a bad reading on the box. Went outside, unscrewed the coax from the splitter, screwed it back on tightly and everything has been fine since (knock wood). Not saying that's the solution for you, but if a splitter is involved might want to give it a try, see what happens. Good luck.