Follow-up for the RCA set coming on and off by itself....
We took the set apart and cleaned the ribbon connections for the front switch board. We touched up the solder connections on the circuit board as well. Once re-assembled, the set played for the rest of the day with no further problems.
Maybe it was a poor connection.
If you DO decide to do as we did, BE CAREFUL.
The set is very heavy. Get help.
Unplug the set before you do anything else.
The high voltage circuit can still hurt you after unplugging. Stay away from ANY large components.
You're on your own if you get hurt. Be careful.
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Hisense is a relatively new Chinese TV brand, and the first couple I owed all had audio problems. A sharp chirp was emitted every time a switched from an HD channel to normal resolution.
1. Try different sources to see if audio comes through on those devices. If so, it could very well be something simple like a muted device.
2. If you pipe everything through a receiver, check the volume options there first before you start throwing things out the window. If you own a small gnawing animal, check speaker cables to see if they still go places.
3. If all 3rd party device possibilities have been ruled out, open up the menu and explore the audio options for the TV itself.
4. If all else fails and you're ready to turn this thing into a pile of glass, try a factory reset. You can find this option by going to Menu > System > Factory Reset.
Good day, I might be missing something here, but if YourTV has the basic controls on the TV itself, such as on/off volume, and channel select, then just turn on tv, and set it to channel 3. Use your converter box remote to scan for channels, and other options it has as needed.
Question: Take the batteries out of both the remotes and then try to turn the TV on with it's On/off switch built into the TV. If it turns on and the volume stays the same, then it must be an issue with one of the remotes. If the tv turns on and the volume ramps up to max. Please check if volume knobs/buttons on the tv itself to see if they are sticking. If they aren't, there is something wrong with one of the boards in the tv of course. This sure should be something a Sony Service Shop can fix. I don't think it will be expensive. Maybe a $100 to $200 repair if they do the work. Blessings, A/V Media Guy
It sounds like one of the volume down buttons is stuck in the activate position. The same as if you were holding the down volume button continuously. It could be either the volume down button on the TV or the remote. I would try remove the batteries of the remote then adjust the volume by the TV buttons.
If the volume doesn't go back down then the remote is the problem. In order to fix the remote you may need to take it apart. This is normally easy to do just locate any screws that may be holding the remote together. If you don't see any screws then you will need to pry the two sections apart. Separate the circuit board and rubber buttons and clean them both with some rubbing alcohol and reassemble it. If it still has the volume issue you may need to replace it.
If the problem persists with the remote deactivated then it's the volume button located on the TV. That is a little more difficult. You can try wiggling the button or some canned air (used to clean computer keyboards) to blow it clean. However it may need to be disassembled to gain access to the switches for proper cleaning. Hope this helps.