Here is the link to the user manual for the TV if you need it; http://www.haier.com/admin/en/product/upload/42EP24S-UM.pdf Check page 7 - The DVI input has next to it an audio input - DVI does not carry audio as HDMI does - you need to plug a seperate mono audio cable from your cable box to the TV at the DVI Audio input (top of page 12). The Audio needs to be in the one next to the DVI socket in order to work at the same time as the picture from the same "source" selection. Check page 18 "CATV Type" and make sure this is set to the correct one for your cable box Check page 21 that all the audio settings are logical and nothing is turned right down or muted. If none of this helps then please post back. What make and model is Your Cable box? Hope this helps :)
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