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Hi Tom...0980-0140-0140 is the wi-fi card for your model TV but I'm a little confused at the repair they did 2 years ago. You said the set was dead other than the vizio standby light was orange if I understand you correctly. Basically, the TV was in the standby mode, the main board was waiting for a signal from the remote IR sensor or power on button to come out of sleep mode and turn the set on. What I don't understand is how a wi-fi board replacement would repair the TV....The set can be run with this board unhooked and should power up and work ok other than you wouldn't be able to connect to the internet. Vizio is kind of a different breed of TV, they make good sets and are a good quality TV but they do things a bit different than most brands so it's possible I suppose the wi-fi card could make the set not come on. An example of them doing things a bit different is a bad IR card can cause the sound not to work, I have no idea why this is, Vizio support either doesn't know or won't tell me and getting a schematic on Vizio TV's is almost impossible to get other than some older sets. Ok...soooo...where I think your issue is at would lean towards either the power supply board or main board. The model set you have has some issues with the EEPROM on the main board having corrupt data and that will make the set stay in the standby mode, there is an easy way to test this with a voltage reading on the PS/ON pin on the power board to find if it's a power board or main isssue. You said they're giving you mixed messages on repairing it, what are they telling you the problem is with the set?
If the infra red sensor connector was removed and tv shuts off then it is propably a main board issue Check for software updates first , if not then send for repaire/replace main board .
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https://www.youtube.com/watch?v=Qba7_YHnXwM
Dec 2, 2013 - Uploaded by ozzysslayer
42" Vizio TV flickering strobing easy way to repair VW42L HDTV10A LCD TV ... EASY How to Fix Samsung LCD TV Flashing Flickering Screen!Missing: vp422hdtv10a ‎snow
InstructablesSo my Vizio TV was flashing on & off rapidly every time I switched it on. ... good way to get something to work, but it got things working until I had time to repair it.
Aug 26, 2015 - Vizio TV power cord plugging into a power outlet. Do you know ... Powerproblems might require service or replacing parts inside the TV. Before ...
InstructablesWhere can I get a replacement screen for a Vizio 70" that cracked. Model .... Is there a repair to resolve this problem and where do I find information? IMadeIt
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https://www.youtube.com/watch?v=d3wSCSfatjQ
Jan 27, 2014 - Uploaded by mario gutierrez
Find out how to repair this? I have the ... Cracked TV Screen - LCD & LED TV Panel Repair Options & Replacement ... VizioFlat Screen Repair.
What you are dealing with is not a bad remote controller, the problem is from your IR Sensor. You will need to replace this IR Sensor. You Vizio TV has a common defect with the IR Sensor. Make sure you order the revised version so you don't encounter this problem again. You can find the IR Sensor here: 3637 0022 0189 0171 1671 0892 Vizio IR Sensor
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