Vizio E390-A1 main board firmware corruption

[crosstalk]

I got a vizio e390-a1 that wouldn't boot (power led on, no backlight). Main board 756TXCCB02K042. Based on other reports, it seemed like a firmware corruption problem. I couldn't find the firmware online, so I bought a working board on ebay for about the same price as a pre-programmed chip. Sure enough the firmware fixed the old board. Send me a PM if you need the file.

[budm]

Re: Vizio E390-A1 main board firmware corruption

Main board for $15?
http://www.shopjimmy.com/catalogsear...=vizio+e390-a1

[crosstalk]

Re: Vizio E390-A1 main board firmware corruption

$26 delivered. I figured that was a more sure bet than just replacing the flash.

[budm]

Re: Vizio E390-A1 main board firmware corruption

Good price, just hope that EEPROM on this one does not go out either, hate EEPROM.

[Shane711]

Re: Vizio E390-A1 main board firmware corruption

Note: In my experience the program on the EEPROM does not go bad but the IC does. I have copied the program from the bad EEPROM IC and wrote it to a NEW IC and the TV was fixed. I am sure this is not true for all cases but it has worked for me so far. I pay about 0.25 cents for my blank EEPROMs.

I just got this Vizio E390-A1 yesterday and I am about to try this method. The TV power indicator turns white but no backlight.

[dick_barton]

Re: Vizio E390-A1 main board firmware corruption

I got a vizio e390-a1 that wouldn't boot (power led on, no backlight). Main board 756TXCCB02K042. Based on other reports, it seemed like a firmware corruption problem. I couldn't find the firmware online, so I bought a working board on ebay for about the same price as a pre-programmed chip. Sure enough the firmware fixed the old board. Send me a PM if you need the file.

Perhaps you would be prepared to share the file. Hamie has an EEPROM thread which is being added to.

https://www.badcaps.net/forum/showthread.php?t=59877

[Shane711]

Re: Vizio E390-A1 main board firmware corruption

I got a few files I can share. Every time I copy an EEPROM I save the file. That is after I confirm it is working.

[dick_barton]

Re: Vizio E390-A1 main board firmware corruption

Hello Shane
That's excellent and could be added to Hamie EEPROM thread if that was OK with you.

[Shane711]

Re: Vizio E390-A1 main board firmware corruption

Copying the EEPROM for this E390-A1 did not work, like I said, it doesn't work every time. Maybe my problem is not the EEPROM but I will have to order a new one or the whole kit and find out just what the problem is.

I think I may have used the wrong EEPROM, I did not have a perfect match. I will order some blank ones and try again.

[dick_barton]

Re: Vizio E390-A1 main board firmware corruption

Sorry Shane711,
My request should have been made to Crosstalk.

[jones]

Re: Vizio E390-A1 main board firmware corruption

vizio e390-a1
the led turns white but no picture no sound and cant turns off after that, this is how i fixed it:
test around the eeprom for the voltage should get 3.5 to 5v. test the connector goes to keypad board, if you click to any button should see some change in voltage 1 to 3v
thats mean the main board and processor are good, is just the eeprom software crashed
remove the eeprom read and save it to the computer, and rewrite it with the same file and it will work, can use the same eeprom.
if this didnt help, write another epprom with the same saved file and try
hope this will help someone and save the earth from waste electronics

[Mmcintosh01]

Re: Vizio E390-A1 main board firmware corruption

Bought a vizio v435-g0 yesterday from walmart it was on clearance. Got it home connected to wifi and updated filmware and now tv is stuck on vizio logo screen. From what I'm seeing people say it's a corrupt main board is there anyway to fix filmware through usb?

[lotas]

Re: Vizio E390-A1 main board firmware corruption

Bought a vizio v435-g0 yesterday from walmart it was on clearance. Got it home connected to wifi and updated filmware and now tv is stuck on vizio logo screen. From what I'm seeing people say it's a corrupt main board is there anyway to fix filmware through usb?

https://support.vizio.com/s/article/...language=en_US

[DXseekerMO]

Re: Vizio E390-A1 main board firmware corruption

Bought a vizio v435-g0 yesterday from walmart it was on clearance. Got it home connected to wifi and updated filmware and now tv is stuck on vizio logo screen. From what I'm seeing people say it's a corrupt main board is there anyway to fix filmware through usb?

https://support.vizio.com/s/article/...language=en_US

I wound up with this same model V435-g0 stuck on the logo screen. I downloaded the firmware from the webpage above, made sure my thumb drive was FAT formatted, extracted the 2 files to the thumb drive, put the drive in the TV and plugged it in. It turns on by itself after AC power is applied. The indicator light on the thumb drive flashed 11 times and the TV doesn't download $hit.

Vizio TVs are worthless as tits on a chicken. Honestly I'd like to have two of them....one to $hit on and one to cover it up with, like a cat does a turd in a god d@mn sandbox. I've read new TVs of this model getting a firmware update during their first setup then restarting only to freeze on the Vizio logo.

What a crock...an absolute crock!