Vizio M550NV help--Rookie repair

[yotaman]

I have read the search threads on this set.
Here is my story.
In-laws set, 4 years old. Dish struck by Lightning. Only thing would come on was the solid color vizio power light. Took apart and tested output voltages and found only standby of 5.19 on two terminals. Ordered a used ebay power supply board and installed it. Same voltage so I assume I did not know how to test properly the Pwr on jumper deal but it was not clearly marked so I didn't wanna smoke something else. So I pulled replacement board and put old one back in. New board to be returned I just pay shipping. Now when I plug it in the light flashes a bit then goes solid and Vizio start up screen with Apps, Internet, etc on it comes on but the remote does not have any control over it. After a while it will go off then later cycle back on...same as some of the other threads on here I read where the EEPROM chip is blamed.
My question now is is this TV worth fixing ? A local repair shop will charge me a 60.00 deposit to be applied to the repair if I go through with it or keep the 60.00 for his effort. I just don't wanna get into deep and something else go out on it. Does anyone know what this repair would run if that is the issue. BTW, the TV appears to be a LG under the cover. the panel and boards all say LG on them. Appreciate any advice. I hoped to get lucky and fix it but I am hesitant to do the main board swap cause I am afraid something else could be messed up to.

Thanks,
Kyle

[budm]

Re: Vizio M550NV help--Rookie repair

More likely to be bad main board than anything else.
When the power switch is activated, the main board will send out the PS-ON command signal to turn on the PFC Voltage booster and the rest of the power supply.
Pictures of the whole back side of the TV and the pictures of the connectors on the power supply board so we can see the pin labels of the connectors?

[aaronwt6]

Re: Vizio M550NV help--Rookie repair

The fact that it comes on and shows the apps leads me to believe that it's the eeprom. You can buy a replacement eeprom for it pre-programmed for around the $20-$30 range. Not the easiest thing to change without the right equipment and experience but certainly not very expensive. The main board for that TV will be quite pricey to replace.

[ecking767]

Re: Vizio M550NV help--Rookie repair

You can buy a replacement eeprom for it pre-programmed for around the $20-$30 range. Not the easiest thing to change without the right equipment and experience but certainly not very expensive. The main board for that TV will be quite pricey to replace.

Where can you buy this EEPROM or Nand Flash memory for the Vizio M550NV? I have search the web and can't find anyone selling an replacement "NAND FLASH memory" for any Vizio smart TV.

[Eikon81g]

Re: Vizio M550NV help--Rookie repair

I see these eeprom kits on Ebay currently (for the record). I see that this is an older post and I am currently researching for a rookie repair of my own.. I may have a mainboard available soon if you are still looking. I have an M550nv that has a bad panel I believe. Message me if you are looking and I will let you know if this one will be available after I finish my repair attempts.