Sanyo TV - black screen, sound find

you may be trying to change the channel with the TV remote. The TV probably needs to remain on channel 3, then switch to the Cable remote (make sure its in Cable mode) to change channels.

Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/

First check the inverter for any burst capacitors and the display boards.

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

This happened to me its probably too late for you but might help others. what i did to fix this is, I put the tv onto a radio channel (with no picture) and about 10 mins later i turned the volume down and realised the screen was still on as the volume bar showed up. so i guessed it the problem was to do with light so i went on the menu and went into features and turned the backlight onto minimum and the tv has been fine since. hope this helps!

I had this same problem this morning. Luckily, when I reset the whole thing and did the channel search again the sound returned. I have no idea why it fixed it but it did. Hope this helps you.

The problem with the black box happened to me. I had pushed the subtitle button on my remote by mistake. Interestingly enough, as soon as I pushed the SUBTITLE key again, on the remote, the black boxes disappeared.

It also says CC which means closed captioned-- So the bottom on my remote is Subtitle, and then on the subtitle button is cc...

I hope this helps

The black box is there because your closed captioning is on and set to text mode. Some channels send the signal even when there is no actual text to display. You can get rid of it by either turning off closed captioning or changing it to CC1 or CC2 mode instead of text. If you can't find those settings, then restore factory settings as directed in your user manual.

try changing the channel with the original remote or by the tv's physical controls. It sounds like it has switch to an AV channel.

On your remote should be a button called TV caption or text. Turn off the closed caption as someone hit it and turned it on by accident. If its not on your remote, then it is in the menu. Good Luck Ps Please dont forget to rate this thread.