65" vizio new and my remote won't work

Flat batteries.
Broken remote.

Do you have a smartphone?
Go to the Camera App and Select selfie mode, the front facing camera. Hold the remote so the camera can see the front of it. When you press the remote button, you should see a red dot flash in the phone screen.

If your Vizio remote quits working, it can from having low batteries, or a blocked TV sensor or a power residue of the remote and the TV or a dirty power source or a stuck memory of the remote or problems with the TV itself.
Make sure that none of the remote buttons are stuck or jammed . Try and reset the remote. The remote might not work temporarily due to the poor contact of the battery or and static electricity. Remove the batteries from the remote.

I'm leaving the link here for you to order a replacement https://support.vizio.com/s/article/How-to-Order-a-Replacement-Remote?language=en_US

Hello Mat,
Read the instruction manual that came with the remote as that has codes in it and the procedure to program the remote also. You can also look up the codes via the internet using the make and model of the remote. The listing will usually have all possible codes that might work with your Vizio tv, and you have to try them all until you find the 1 that works.
Good Luck!
Rich Lilja

If you wish to get more; check the site linked here. It has set-up code list & set-up procedure to many popular brand remote controls. See it in "Mosaic" view. It will make surf easier.
http://electrohelponline.blogspot.com/
Try this link too
http://remotesearch.blogspot.com/

hello!
"Element" codes could be: Polaroid, MAG, LG, Vizio.
Have you tried "code search" mode on universal remote? If you won't find the luck of those "brands" I suggested, do "code search". Refer to remote's owners manual. I did the same for myself: obtained RCA convertor box, without remote, RCA codes won't work, RCA is out of TV business. By using "code search" I made it work. Then, you may want to do "code retrieval" option, to know the correct code.
good luck,
Alex.

On the vizio remote go to menu then picture then click the more button then advanced pic then turn off ambient light sensor and bscklight control. I also had to play around with the backlight #

Had same problem - turned off Adaptive Lumina, Backlight control, and Ambient light sensors on the Vizio advanced picture settings and the Dish remote now works. Vizio was emitting an infared signal that interfered with the Dish remote signals with these settings on. TV still works and looks just fine... But best of all Dish remote works too.