I am a longtime subscriber on the Extreme FiOS TV tier. Until recently, my main complaint was the lack of El Rey despite that channel being part of the tier beneath Extreme... but in recent weeks, a separate issue has me tearing my hair out.
I am experiencing problems with channels primarily in the upper 600s. Some of them seem fine; if I want to restrict myself to watching those, things appear to be functional. Some of them (680, SyFy HD being a very frequent example) are returning "Channel [x] is Not Available" 99 times out of 100. If I go up the virtual dial to 696 (E! HD), not only do I get the "Not Available" blackout... but for a short while, my STB acts sluggish, and the channel blackout effect now happens on channels that were fine just a minute ago.
I have had one instance in which the outage extended to all channels for several hours. Generally, the outage is more like twenty or thirty seconds on those formerly-functional channels before they return to normal.
I have tried running the troubleshooter on this site, which did not help. Changing the channel away from and back to the specified channels did not help. I have rebooted my router and my STB repeatedly. I have checked the coax cables (and replaced them with newer ones) from the splitter to the router and to the STB. I have paid my bill.
Further information on request.