Have TV Questions? Ask a TV Technician
Hello, First off- we are not Vizio- this is Just Answer which is a tech support site with experts that work on all kinds of TV's.
I can help you with this problem however. Next- the IR sensor board is plug and play and located at the bottom of the screen- it's a 3" long by 1/2" wide board held in place with two screws and a plug in harness. It's the same IR sensor used in about a dozen Vizio sets and is at the link below for $15:
However, I noticed you mentioned the sensor right off the bat- but never mentioned if you tested the IR emitter of the remote? Have you done that yet?
If you haven't already done so- view the tip of your remote through the viewfinder of a cell phone camera or digital camera and press any of the buttons on the remote. If you see a FLASH through the viewfinder- then the remote is good and the IR sensor in the TV is bad. However if there is no flash (the IR flash is only visible through a digital camera), then the remote is bad and can be purchased at the link below for your set:
If you need further assistance let me know. Please do not forget to click the 5 STAR RATING, at the top of the page for my efforts. It is my livelihood and you can follow up at any time if needed.
To access the IR sensor, remove all of the screws on the back of the TV- remove the back panel and with the TV face down- back removed, it will be located in the lower right hand corner and easily accessible.
Do you need further assistance with this?If not, could you please click the 5 STAR RATING, at the top of the page for my efforts? It is my livelihood and you can follow up at any time if needed.