Vizio E420-A0 with bad EEPROM

[budm]

TV won't turn on power on with remote or buttons (LED indicator remains same color). The PS-ON stuck high, BL-ON stays LOW.
Got the replacement EEPROM from SJ through AMAZON due to free shipping.
http://www.amazon.com/Vizio-E420-A0-...E420-A0+EEPROM

[ecking767]

Re: Vizio E420-A0 with bad EEPROM

did the EEPROM fix the problem?

I was working on an E320-A0 that turn on but the back-light wasn't turning on. I replace fuse,two FETS and a couple of caps for the LED driver circuit and then I was half way there.

NOW I got back-light but no picture on the LCD screen. had to replace an IC by TI which control the +12volts that was needed for the LCD screen. TV is now working

[budm]

Re: Vizio E420-A0 with bad EEPROM

'did the EEPROM fix the problem?'
Yes, the TV is working with all functions.

[budm]

Re: Vizio E420-A0 with bad EEPROM

did the EEPROM fix the problem?

I was working on an E320-A0 that turn on but the back-light wasn't turning on. I replace fuse,two FETS and a couple of caps for the LED driver circuit and then I was half way there.

NOW I got back-light but no picture on the LCD screen. had to replace an IC by TI which control the +12volts that was needed for the LCD screen. TV is now working

You may want to see this Video.
https://www.youtube.com/watch?v=Sghh8BK5zIw

[mmartell]

Re: Vizio E420-A0 with bad EEPROM

We need a resource here with eeprom dumps, at least those with high failure rates.

[Anglngr9]

Re: Vizio E420-A0 with bad EEPROM

Hello guys I have this tv but the maiboard is different from the picture and I cant Locate the eeprom to change the board I have is a 0171-2271-5032 and the only eeproms I find are labeled as UP5 UP3 UL1 UH11 UH10 please help me out finding the right eeprom to replace thanks I cant find the US5 US4 on it....

[budm]

Re: Vizio E420-A0 with bad EEPROM

What is the Exact model number and serial number of your TV?
E420-A0 is not the same as E420i-A0 (Smart TV).

[Anglngr9]

Re: Vizio E420-A0 with bad EEPROM

What is the Exact model number and serial number of your TV?
E420-A0 is not the same as E420i-A0 (Smart TV).

you are right my tv is the E470i-A0 I was under the impression there were similliar and had the same problem, when i was doing research I saw people talk about E420 and E470 with the same issue, I got the eeprom but after I look in the board I cant find the eeprom I have to change, I hope someone has had this and know which one to change

Thanks for any help

[budm]

Re: Vizio E420-A0 with bad EEPROM

You should start a new thread and upload good clear pictures of the boards and the whole backside of the TV showing all the boards.
What is your TV not doing?

[Anglngr9]

Re: Vizio E420-A0 with bad EEPROM

I will start a threat tonight as I take pictures, my TV doesnt turn on, when you turn the tv on the power light lights up and then dims away and never turns on, I switched the power supply thinking that was the problem but the TV didnt turn on at all still, that is how I stared reading more and found out that eeprom gives a variety of problems from not turning on to no video to no sound, so I ordered the piece to check if that fixes the problem thinking that the eeprom would be labeled as the others, but unfortunately I dont know where is the eeprom that i have to change and have not been able to find information on how its labeled or where is located.

Thanks

[Anglngr9]

Re: Vizio E420-A0 with bad EEPROM

Hello I posted the new thread here I leave you guys the link I hope we get someone to help thanks so much

https://www.badcaps.net/forum/showthread.php?t=66384

[dabone]

Re: Vizio E420-A0 with bad EEPROM

Does anyone have a copy of the eprom image? I've got one that has good standby voltage, but power button does nothing.

My board is a 3642-1742-0150. Same as the board at the start of the thread.

Thanks.