Question about Vizio Televison & Video
I have a Vizio 50" tv which does not power up occasionally. I've tested the power supply board and ruled that out as the problem. I'd like to fix it-as opposed to replacing it- if possible. What could be causing the problem.
Posted by Anonymous on
It can be a processor fault, or software fault. check the manufactures web page for your model and see if there is an update for the software.
Posted on Jul 23, 2017
You can look at the various module failure symptoms and service / replacement options for the L42HDTV10A here:
Posted on Apr 25, 2013
Is this the same main board as yours as shown in this thread?
There are two fuses and 3-pin voltage regulator ICs that need to be checked and report the result as shown in this thread:
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
Voltage Regulator (LDO) testing:
Inverter testing using old CFL:
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
TV Factory reset codes listing:
Posted on Mar 11, 2016
SOURCE: Vizio LED TV model # e500i-b1. No sound picture. On light stays on. Not sure if it's the main board or the t-con board or another thing. Did the flashlight test and didn't see anything in the screen.
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.
Posted on Aug 22, 2016
It sounds like a surface mounted capacitor blew out. Examine the main board and see if you can see the failed part, if you do then replace that board.
Posted on Dec 28, 2016
Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Posted on Feb 27, 2017
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