A year or so ago my tv stopped showing a picture with the coaxial cable. It will work and show a picture if I hook the cable up using a cable box through the HDMI plug. I tried hooking cable tv up through the 3 different audio video hook up from the cable box and out of the 3 video hook ups only 1 will show a picture but the audio doesn't work and the other 2 the audio works but the video doesn't work. I removed the video board and the scaler board. I checked the fuses with a ohm meter and I visually checked all the capicators
SOURCE: Hitachi 50V720 No sound with HDMI - no Component video inputs
Right now there seems to be many people with the same TV problems with sony and HDMI cables. Most of the solutions are resetting the TV and sony product. Try leaving your TV unplugged for a hour to let it reset itself.
SOURCE: My 50Hda39 50 in plasma doesn't work through the coaxial cable hook up
Please contact the authrized service center for Hitachi. Sounds like corrupted firmware. Firmware update is necessary, and the firmware to Hitachi is very difficult to get by internet. If you wish to get some details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy. Surf the site with patience.
http://electronicshelponline.blogspot.com/
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Sorry, I checked all the capacitors on all the boards. Everything looked ok. What should I check?
I just put the boards but into the tv and i reset and ran the tv through channel reprogramming and it only was able to detect only a few of the digital channels which mostly consists of music channels.
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