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Re: new 50" hisense tv .. unable to use hdmi for cable...
There might be a setting on your cable box for audio output. Use the cable remote and look in the audio section of the settings menu and select HDMI output. Mine is under Audio Digital Output in the Audio/Video menu.
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Are you using an HDMI cable and a digital box from your cable/sat company?
HDMI supports 2 different audio formats and when using a box from your provider sometimes the tv thinks the other format is available and switches to if for a few seconds. Try using a HD component cable, they have Green, Blue, and Red video with Red and White audio, if the issue is your TV switching between formats this should fix it.
You have reversed polarity in your outlet and probably not grounded. If you have any voltage setting on the ground of the hdmi then its your home electrical at fault. If you take the extension cord and reverse the plug from the tv to the ext cord you will probably not find any voltage on the hdmi.I know the neutral is wider but you can make it fit just to test. We ran into this years ago when cable boxes came out with older homes.
Bob, you need to first raise the volume on the actual cable box itself. On each cable box there is a channel (up and down) as well as volume (up and down). Set the cable box volume to maximum, you can only do this manually at the cable box. This should work.
Did you try holding down the Power button until you heard 3 beeps? It is not uncommon for the video output to exceed the resolution of different television. This hard reset feature was added to troubleshoot such a problem, factory resetting the video settings.
Try resetting the TV by holding down the "up" button on the remote (with the TV powered on) and then, while you hold down the up button on the remote, hit the power button on the TV. This should do a "factory reset" which will wipe all settings in the TV. There is no reason why the TV should not "remember the last input it was on when it was ;last turned off. Also be sure that the TV is not plugged into a switched AC outlet, like the outlet on the back of the cable bix. The TV should be plugged into an output that receives power at all times.
It may be the top of set box.. Most times the sound and picture are auto detected by the set when HDMI is used. Both sound and video are carried in a HDMI cable but not with a S video cable. Try another HDMI cable *** dont buy the expensive one the tv don't care if they cost $125 or $25.
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