Vizio VO420E - INV_ON signal stays low

[vinceroger69]

Re: Vizio VO420E - INV_ON signal stays low

if you cant repair your old board just seen this on ebay not sure if its 100% so double check if you do decide too buy it and make sure it has a return policy if faulty
https://www.ebay.com/itm/VIZIO-MAIN-...%257Ciid%253A1

[ngth82]

Re: Vizio VO420E - INV_ON signal stays low

OP here. I received the EEPROM last week. Just finally going through my mail box as I was on vacation last week.

The replacement kit comes with 5x LDOs and the EEPROM. The markings are shown in the attached image - looks like a 32Mb (4 MB) SPI flash device. I'm going to dump the EEPROM contents at work on Monday and post it to this thread and the EEPROM dump thread for future reference.

I'll install the EEPROM Monday evening after I have a known good backup copy.

Markings are as follows:

MXIC MX
25L3206E
M2I-12G
3T871700
KT60576

The blank part can be found here: https://www.digikey.com/products/en?...5L3206EM2I-12G

Thanks!
-Thomas

[ngth82]

Re: Vizio VO420E - INV_ON signal stays low

The EEPROM dump from the replacement part is attached. I also posted this into the EEPROM dump thread.

[vinceroger69]

Re: Vizio VO420E - INV_ON signal stays low

Thanks for the eeprom dump did the replacement eeprom solve the issue with your tv.

[ngth82]

Re: Vizio VO420E - INV_ON signal stays low

I was tired and didn't work on the TV yesterday. I'll see if there is time to work on it tonight, but this week is fully booked with work/home items.

[ngth82]

Re: Vizio VO420E - INV_ON signal stays low

just replaced the SPI Flash. Confirmed fixed. Tv boots.

[budm]

Re: Vizio VO420E - INV_ON signal stays low

Glad to hear that EEPROM fixed the problem.

[ngth82]

Re: Vizio VO420E - INV_ON signal stays low

Likewise.

I found the kit from eBay for $15.99. Just need to sell the unit soon!

[ngth82]

Re: Vizio VO420E - INV_ON signal stays low

TV sold for $80. Thanks for the help guys.