My vizio tv stops responding to the remote

Have you find out if the problem is with your remote control? For instance, you are able to control your TV using a Universal remote control. My 32" Vizio TV had a similar problem, initially thought it was related to my remote control but in fact the TV didn't respond either to an universal remote control of my SAT receiver that I eventually use to just turn on and off the TV. I've found out that the problem was with a little board on the TV located at the left down corner viewed from the front side of the TV and that receives the signal from the remote control. I found the board on ebay for about $5, replace it and the TV responded again to both original and universal remotes.

To turn off blue tooth on remote push the Q button, Space button and P button simaltaniously while pointing at tv.

Try to push the TV button that is lit red at top middle of remote for 5 seconds in stead of hitting input. In other words by holding the tv button down it might trigger it to respond better. Thanks Mike

Check the remote control for its infrared emission. Check it with fresh batteries. Check it by pressing all the keys. You can detect the presence of infra-red emission from the remote control, using a cell-phone camera. If you wish to get more details about how to check a remote control, please visit this site. One among the posts has details about it. In some cases, the remote control might need to clean.
http://electronicshelponline.blogspot.com/
http://remotesearch.blogspot.com/
Search the site by type in this key phrase "how to test a remote control "in the "search box at the top right of the display window of the Homepage" to get the related post quickly.
https://youtu.be/wUpnETSm6_k
https://www.youtube.com/watch?v=jsSCNCW3IbQ [open and clean]
https://www.youtube.com/watch?v=Qp-l1uh-5gE [open and clean]

Vizio is famous for having main board issues. If you have replaced the IR board the only two other items it could be is a broken wire from the IR to main or the main board has an issue. Nothing else can stop the remote from working provided the remote is working properly.

Even after replacing new battery cells only ON/OFF button responding and other buttons are not responding. Pl suggest how to solve it

If only one button does not work at all or all do not work the unit may have a lock out feature that would be explained in the owners manual.

^_^ Those answers are only for new remote but that's not the only way, There trying to ask in another way with out a remote.

Souds like the tv has condensation on the circuits, keep using it may dry off the condensation. Switches will start working again.

Change the batteries in your remote. If your cat was laying on a button it could have drained them.

Here's tip - you can use your camera on your cell phone to see the IR signal coming out of your remote. Point the remote at your cam and press "On" or any button. You should see a bright flash with every key stroke.