What model cable box is this? Since BOTH cable boxes are doing the same thing, this is not likely to be a box issue in fact, EXTREAMLLY UNLIKELY that this is hardware related, and a new box will not solve this. Firstly, if you have any splitters on your connection remove them.
Secondly, you will need to contact Spectrum for a signal and drop line test. Have them dispatch a tech to your home, and put this in the work order. MOST IMPORTANTLY, DO NOT REBOOT ANY BOXES, MODEMS, OR ROUTERS FOR SIX HOURS PRIOR TO YOUR SERVICE CALL APPOINTMENT. REBOOTS OF EQUIPMENT WILL RESET THE SIGNAL ERROR CODES BACK TO ZERO ON THE TECH'S SIGNAL READER. (The tech's reader in this case won't see a problem, when clearly there is an issue.)
When the tech comes, after you have not rebooted any equipment for six hours, tune to the channel that displays the STB error so that he can get a reading off that channel for both boxes. You should also have him check your cable connections to the TV, outside, basement, and main junction box on your street. I would also have the tech take a reading of any free On Demand Channel as On Demand stations are most sensitive to signal issues. No box swap will fix this. We had the same issue three years ago, and the tech spent three hours here installing a new drop line and rewiring our home. Something inside or outside your house is causing this issue. A service call following the above recommendations is needed.
Satch
