Not sure that you would get these days as all the 7xxx models are now old. None of the non-dvr should produce high pitch sounds, but obviously a failing STB could. A dvr's disk can sometime be heard.
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Not sure that you would get these days as all the 7xxx models are now old. None of the non-dvr should produce high pitch sounds, but obviously a failing STB could. A dvr's disk can sometime be heard.