This problem occurs due to IR noise received by the IR receiver on the Cable/Satellite/Set-Top Box which originates from the screen of the LCD TV. This IR noise drowns out IR signals from the remote of the Cable/Satellite/Set-Top Box due to which the IR receiver cannot properly decipher the IR signal it is getting from the remote.
All LCD TVs emit a certain degree of IR radiation but only some external devices with certain types of IR receivers are affected. The amount of IR radiation being emitted is more for large screen TVs.
Elevated levels of IR radiation are emitted under the following conditions:
Ambient conditions which make the problem worse:
Supplementary (crude) Solution: (If the solutions above do not suffice)
Cover the front panel of the Cable/Satellite/Set-Top Box with opaque tape in such a way that only a small window is left open for the IR receiver to accept incoming IR signals from its remote.
Solution 1 is applicable to all LCD TVs
Solution 2 is applicable to TVs with features such as “Dynamic Contrast”, “Active Control” or any similar features which dynamically adjust the intensity of the LCD TV’s backlight.
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