Tv has picture but no audio. Remote will only turn tv on, no other function works. Buttons on tv will not function. Tv was working fine, suddenly not functioning. Hisense 50 in smart tv

The buttons on most remotes are the soft rubber type. The conductive film under the rubber is very thin and gets damaged very easily when pressed really hard. If you can still change the volume using the buttons on the TV and one or more buttons on the remote works and not works at times then it a bad button on the remote. Unfortunately you can't just change a single button as it's mounted on a pad. The whole remote needs changing. Check with TV vendor or look for a replacement on Amazon.com. Try to get the exact model and avoid using a universal remote. Yes, they work for basic functions but won't have the specials lik PIP (picture in picture).
* Oh, if your using a cable box. You may be able to program the cable remote for use with your TV (at least to control power and volume) Check you cable channel for setting up the remote. (They usually have a dedicated instruction channel.)
Aloha, ukeboy57

Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing all the buttons on it; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.

Have you checked the TV without other devices connected to the TV.
Eg. disconnect any home theatre or speakers from the TV.

Verify with audio menu if the settngs of TV speakers is on or off ?
To adjust the audio settings:
1. Press the menu button on the remote. The on-screen menu
is displayed.
2. Use the arrow buttons on the remote to highlight audio and press ok. The AUDIO menu is displayed.
3. Use the arrow buttons to highlight the setting you wish to adjust, then press left/right arrow buttons to change the setting:
• TV speakers - Turns the built-in speakers on or off.

Lastly have you tried restoring the TV to factory default settings.
To restore the TV to its factory default settings:
1. Press the menu button on the remote. The on-screen menu is
displayed.
2. Use the arrow buttons on the remote to highlight system
and press ok. The SYSTEM menu is displayed.
3. Highlight reset & admin and press ok. The RESET & ADMIN
menu is displayed.
4. Highlight reset TV to factory defaults and press ok.
5. If you have changed the default parental control passcode,
enter it now.
The TV displays, "Select Reset to restore all TV settings to
factory defaults and clear all account information."
6. Highlight reset and press ok.
7. Wait for the TV to turn off. The TV will turn back on shortly
afterward and the Setup App will begin

You need to replace your main pcb.

U have a Digital Camera turn it on,take ur tv remote pushes all the remote buttons on the front of the Digital Camera.One by one buttons.If all buttons of the tv remote work will register on the Camera viewing screen,because the Digital Camera able to read infer red signal output.Will figure out wright away the tv remote work or not easily.Tv remote sensor/board have no LED power light lite up might just be a lose connection or just a dead LED lamp only,because all the buttons on the remote sensor/board to the tv panel work wright?Try website Remotes.com to buy tv original remote.

you unplugged the front panel with the buttons on it and the remote reciever
you have to slide the chassis out
reach in to the front and replug the front panel to the plug from the main board
then slide all boards back in place

Need actual Mfg. so I can have Comcast program the Remote??? Comcast has NO listing for the program numbers for Vivitek.

cannot change stations, volume or input methods

Sounds like the IR pickup has gone bad or the supply voltages feeding it are opened. Sometimes cleaning the screen with windex it tends to drip inside as it follows the picture tube down into the set . Most of the time replacing the IR cures your problem. Good luck

You might have lost the code from the remote which identifies the tv to your remote. If you have the manual that came with the remote you might try entering the code again. ( reprogram the remote). Stargazer