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Re: Pixelation on most channels all the time

Call Spectrum's tech support.  Your issue is not with your cable boxes.

 
Pixelation stems from a signal issue (damaged coax, corroded or loose connectors, etc) that a technician is going to need to investigate. Call Spectrum's tech support, tell them which channels are pixelating, and request a technician to perform a drop-line test.
 
Replacing the box only creates a temporary fix. It does not fix the signals causing the pixelation & freezing.