Poor bulk cable TV services in retirement community

Last year my parents moved to a retirement community where their only option is Comcast for both internet and cable tv through bulk agreements.  They were previously with Comcast residential for all of their services and had no recurring issues. But now in this facility, the services provided appear to be outdated and frequently lose signal or are down for hours at a time.  Service calls to the tech department at the facility assure them that their service is working as expected although the hardware seems to be dated and they conclude that any signal issues are Comcast's issue and not something with their local infrastructure.  A Comcast tech has come onsite once and looked at signal on the TV for a brief 15 seconds and also concluded the service was working as expected.   However it's not and worse they monthly for it to only work intermittently with seemingly no possibility of someone actually troubleshooting the problem.

I've contemplated exchanging their cable boxes for them but I'm not sure if the current ones are registered to their unit and if they'll be penalized when it's time to return them, also if exchanging the units would even fix the problem or create a different problem.  These boxes also do not seem to auto-switch from non-HD to an HD channel.  For example, they can watch channel 7 in SD or they can manually enter change 707 for HD.

I've included some screenshots of the issue, the diagnostic screen and model of the cable box.  Can anyone suggest how to get this resolved?  I've spoken to Bulk services team in the recent past and will try to call them again but am exploring all options to get this resolved for them.