I checked Hi-Fi Remote here and here (not sure if it's a cable or satellite box) and didn't see any LG codes there either. LG did acquire Zenith some time back and continued to use their brand name in the US market for a while, so you might try the Zenith codes. For a cable set top box, that'd be 0000, 0525, and 0899. For a satellite set top box, that'd be 0523 and 0856.
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gonk
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