Looks like the Arris VIP5662W isn't playing nice with my setup. Arris VIP5662W > HDMI Splitter (to boost signal strength according to the contractor that wired up my house) > in-wall HDMI thru Cat5e/6 > HDMI > Sharp Roku TV (not 4k). I intermittently get a black screen when I turn on my TV or leave the input source, as a result, I'll need to reboot my PVR.
I can spot two points of failure and it's likely the HDMI Splitter or the HDMI thru Cat5e/6. The only reason why I needed the splitter because the HDMI thru cat5e/6 wall plug is passive; therefore, it needed a "boost." The distance is relatively short and I can probably get away running a 25' HDMI cable in the wall and leave the old cabling there if I need it in the future.
It is now set for Next Thursday. I will request the tech to change the PVR and see if it works. If not, I will just stay with the Arris. I have a lot of recordings on it. Don't want to lose it for nothing. Will update next week.
Update: Got fibre installed. Everything went well. However, the technician didn't have the new Technicolor boxes yet. He said it will be sometime in December. So, I will have to wait for another 3-4 weeks.