Re: Vizio E3D420VX turns off on its own wont start back up

Ok I got the TV working again. I end up buying a mainboard from Shop Jimmy and replaced. Its been about two weeks now and Ive had no issues.

I forgot where I saw it but it said that if this TV had the problems I described it was because the chip got fried or was corrupted. It stated the fix was replacing the mainboard and sure enough, its worked so far. I hope this helps. The mainboard was around 100$ at shop jimmy.

I have a blasted TV that Ive been troubleshooting for months. It turns off on its own and wont start back up. I have done the whole unplug and hold power button down for 30sec as recommend by vizio but that doesnt work anymore. This has been pissing me off because its intermittent in that if i leave it unplugged for a day it will cut on after that for anywhere between 5 mins to 24 hours.


Ive been T/Sing mines on and off for about 6 months now. I replaced the power supply and it has the exact same issues. I have tried looking for voltage regulators on the mainboard but honestly...

Re: Vizio E3D420vx No Standy Power. Why?



Thanks but Ive already seen this one. I have a different board and there is no U33 on mines. Ive check all the voltage regulators and they seem to be correct.

I am currently looking at the power supply again. I have 2 and they may both be bad. I thought I had bad diodes so I ordered new ones. For the top 2 ,they were measuring around 150 on the diode test, so I assumed they were bad (saw diodes should be between 300-800); this measurement was on both boards. Anywho ordered new ones (8) from digikey and they...

Re: Vizio E3D420vx No Standy Power. Why?



What have you done with the ones that have been mainboard issues; do you fix the mainboard or buy/swap it out for another know working mainboard)

Ive been T/Sing mines on and off for about 6 months now. I replaced the power supply and it has been the exact same issues. I have tried looking for voltage regulators on the mainboard but honestly I cant pick out any except two (up13, up2) and those have the same voltage readings when it work and when it doesn't. They are some other 8 pin chips that might be voltage...