wrote: You likely have signal issues related to the coax wiring somewhere. Call and schedule a tech visit.
Agree with Reds,
You will need to set up a service call. When you do that, avoid resetting any equipment for at least six hours (boxes, modems, routers) so the tech can take a signal test. Reboots of equipment will set the error codes back to zero and you don't want that.
Than, when the tech comes, tune to the channels that are breaking up, so that he take a signal reading. You may have cable line issues. A new box will never resolve signal or line issues,
Satch