Vizio E422AR turns on, with V on screen than shuts off

[tibimakai]

I have picked this up really cheap and it seems like a corrupted EEPROM, but nobody sells an EEPROM for this TV.
When the TV is turned on, the Vizo logo in the bezel turns white, the V logo shows on the screen for a couple of seconds, than shuts off.
The only thing that I can do, is replace the mainboard?

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

was reading earlier, pretty sure it was about a vizio, where they shorted out 2 pins on eeprom, then went into service menu, and adjusted some settings, I'll see if I can find it again.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

It would be nice, if it would be so simple.

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

crap my bad, it is for a samsung, not sure if it would translate, its here. http://techreport.com/forums/viewtop...2360&start=570

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

not sure its a little deep for me.

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

can you do a firmware update?

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

I think I need to try something like this on this samsung, I think a surge messed up the firmware, naturally samsung dont have its firmware on their little site, plus I cant see the menu, screen is too snowy, unless its a component/s failure on mainboard.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

Vizio, does not offer firmwares.

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

Vizio, does not offer firmwares.

ouch

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

Maybe there is something available, while the TV is connected to a network, but there is nothing for download.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

There is a buzz on the power supply while it is on.
The voltages look OK.
The PS_ON is almost 0V, when it is on and 3.27V while in standby.
Both 12V are there.
I'm thinking that the EEPROM is the problem, since the PS_ON it's switching states.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

If the V logo, shows on the screen for like ten seconds and than shuts down, it's 100% a main board issue?

[Shinju]

Re: Vizio E422AR turns on, with V on screen than shuts off

humor me and disconnect the speakers from the mainboard and see what happens when it boots up. This was how I found out my JVC (Amtran) Vizio made LED panel had a pinched wire and the JVC logo would post then shut down once the mainboard initialized and shut down due to the short in the speaker leads.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

Interesting, I will try it out when I get home.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

Speakers were disconnected(they are on the back cover).
I have got another main board and the TV it's working great.
Thank you,

Tibor

[nomoresonys]

Re: Vizio E422AR turns on, with V on screen than shuts off

glad to hear it Tibimakai.

[tom66]

Re: Vizio E422AR turns on, with V on screen than shuts off

Another Vizio with main board issues, wow.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

I'm pretty positive, that it was an EEPROM problem, but nobody sells one.

[tom66]

Re: Vizio E422AR turns on, with V on screen than shuts off

It will be the flash memory IC (EEPROM is a misnomer, but similar technology), probably failed because they write too much to it and data gets corrupted as the flash memory wears out.

[tibimakai]

Re: Vizio E422AR turns on, with V on screen than shuts off

Most likely, you are right.
I'm dealing with Kenwood Nav unit's nand flash as well, which they get corrupted and they go in to a reboot loop cycle.
The only way to fix this, is to replace the nand flash(2GB).
Do you know, usually what is on these flash ICs? It is the firmware?