Two weeks of progressing signs. First HDMI ports stopped working. Then TV powered off a couple times. Finally, it won't power on. Light is amber and won't turn on with remote or button on TV. Am I likely dealing with a main board issue or power supply? Anyone fix this and have this blow again? Hesitant to sink too much money into something that is going to be a problem again. Thanks for reading.
It sounds like a main board issue but could be a power supply issue. I will tell you from my experience with Vizio TV's, main boards are more likely to fail than power supplies. But to be sure, you will want to either get a diagnoses or if you're handy do a little troubleshooting. The power supply and the main board are not cheap so you will certainly want to be sure before spending any money.
SOURCE: Vizio P42HDTV Power on Diagnosis
Please check the U29 8 pin little surface mount mosfet it has this letters > FDS4935 > > In this part inputs 13.2 volts which is ok for the near 12 vdc but it > outputs 1.250 vdc i am 100% sure that this is all the problem > > check it out, and tell me if you´re agree with me > > On this output pin it feeds the audio Ic, the 7809 and the tuner side board > which needs de 12vdc too and its getting only the 5vdc part > > what do ya think?? > > Richard
SOURCE: Amber light issue vw32l lcd Vizio
Its easier to open up your tv, look at the mainboard id number. Then do a search on google or ebay for the parts. Its alot easier then trying to troubleshoot the actual circuit board, unless your an electronic engineer.
SOURCE: Vizio VX42L LCD TV died?
it is the power supply. in the given scenario like yours, the PSU is the suspect in 90% of the cases.
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SOURCE: My Vizio 42" LCD SV421XVT
U getting a non respones from ur remote or the manual side panel tv controls buttons wright.U already tries resetting it back to factory setting.But the problems still the same.Yes,the tv Tuner signal board is the causes and the problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.
SOURCE: My VP504fhdtv10a vizio plasma TV when connect
Logic Control D Board got nothing to do with this problem. This is your main power supply gone bad(usually not the sub power supply). I just repaired my VIZIO by replacing main power supply. Just remove back cover and your board will be right in the middle of the screen. Just get board part/serial # and google it. My best price was through eBay(around $100). Everything is fine now.
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