This is a repair service, you must send us your Main board for repair! Symptoms of a bad Main board covered by this service. TV is stuck on Vizio Logo. TV turns on and then back off either immediately or intermittently shuts off. Volume and channels change by themselves. TV turns on but very slow response from menu and buttons as well as smart options. TV turns on but screen is blank. HDMI ports do not work. More on the repair. Once your board has been fixed, we will test it in a live TV set to ensure quality. What if we can’t fix your board? While it is rare we are unable to fix a board, as with any repair there is a risk involved with the procedure. If in the unlikely event we are unable to fix your board, we will attempt to replace it with a refurbished substitute contingent on our available supply. The item “Vizio Main board Repair Service 3642-1252-0150 (0171-2272-3714) for M420SV” is in sale since Wednesday, October 04, 2017. This item is in the category “Specialty Services\Restoration & Repair\Electronics”. The seller is “nickstvs” and is located in Tucson, Arizona. This item can be shipped worldwide.