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defective Small HD cable boxes

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defective Small HD cable boxes

My small HD cable box keeps going defective. No sound on several channels, and it's always the same channels when the box goes defective. FOUR boxes in less than a year. Last one went defective in one month. Boxes have no air vents, heat builds up and box goes defecrive. Have told Comcast about it four times and they couldn't care less!

Expert

Re: defective Small HD cable boxes

Are you giving the box plenty of space around it for cooling? Don't stack it on top of another device.