Vizio E470i-A0

[x_orange90_x]

I recently acquired a Vizio e420i-a0 that isn't working properly. I have searched the forums and found somewhat similar scenarios as I'm encountering, but not completely the same. When I have the tv plugged in I cannot see any power indicators on anywhere. The only sign of life at first glance is the optical port is lit up red on the backside of the tv. However, in a completely dark room, when I switch the power on, I can actually see the power indicator light come on, but it is very dim and hard to notice even in the dark. Also, I can very faintly see the screen flash with the V logo, then black, then flash again and I can see the No Input message on screen etc. It will continue flashing like this every few seconds indefinitely. At the same time as a flash occurs, the power indicator light will fade in unison, then return to it's solid dim illumination.

I had read in another thread someone's same model would flash once then go black and stay black, and it turned out to be bad backlights. I haven't tested anything on this set as of yet, however I'm not ruling out backlights, but I'm also not jumping to that conclusion yet. I say this because generally, the over current protection kicks in right away and shuts off the set when backlights are bad. In this case, the tv doesn't shut off, it just flashes. The fact that the power indicator light is also extremely dim and fades with the screen flashes makes me think it is a power supply issue, perhaps bad capacitors.

Does this sound like a power supply issue? Or just an unusual case of bad backlights?

[attainteddragon]

Re: Vizio E420i-A0

you really nee to open it up, post some pics and take some voltage measurements.

being a visio, it can also be ldo regulators or eeprom.

[x_orange90_x]

Re: Vizio E420i-A0

I apologize, I have the E470i-A0. I cannot edit my first post to make the correction though.

I forgot to mention that I do not need a flashlight to see the screen when it flashes on.. I only need the room to be dark.

[Shane711]

Re: Vizio E420i-A0

You should take the screen out and test the LEDs. Even though it is lighting up the LEDs can still be bad. A lot of times they do not burn out all the way but go dim. It is usually 1 to 3 LEDs that cause all of them to light dimly. Power surges and turning the brightness up too high cause these problems.

[attainteddragon]

Re: Vizio E420i-A0

i think i left you a message about this tv on another post that you left.

to continue, you really need to get the back off and start getting some measurements.