Vizio V555-G1 stuck on wallpaper; now stuck on V logo

[nomoresonys]

Sure, it's troubleshooting for everyone, in this case we are concerned with the VOLTAGE checking, not if there's a short.

[lotas]

If some of the caps were shorted (and they are usually connected to the power supply), then the TV would not turn on at all and there would be no logo on the screen.

[nomoresonys]

Sure.

[x_orange90_x]

Test any caps that lead back to the chips, usually they are pretty close to the chip.

There's quite a few there! Would you say check any within the white box around the chip?

[nomoresonys]

Test any caps that lead back to the chips, usually they are pretty close to the chip.

[nomoresonys]

Test the little brown mlc caps around the mediatec chip, see if any are shorted, do the same for the eMMC, thats with tv unplugged. Also you can test those caps for voltage with tv turned on, see if you are getting like 3.3 and 1.8 vdc or so on them. Maybe don't run it too long with the heatsink off if the chip starts to get too hot.

[Diah]

dont play with iz any more.... just try use Linux machine and the last firmware you have... use Binwalk to have extract the firmware.... of sure you will find many xml / script that you can use it in command or via usb to trick the MT CPU open the way to write firmware again to eMMC, one things more the socket which not installed CN403 as i can see RX & TX connected to R and the middle GND... so test them with uart / USB low level 3V adapter and terminal to see if there any out put log come out

[x_orange90_x]

Ok, that is a good picture there, now can you take off the black heatsink and post another picture? no more heating or cooling, which you already tried.

Here ya go

[nomoresonys]

Ok, that is a good picture there, now can you take off the black heatsink and post another picture? no more heating or cooling, which you already tried.

[x_orange90_x]

if yours set as photos and title on first post and you did freeze then you do have other things... but..

When I got the tv it functioned like in those photos but would stay frozen on the wallpaper. I plugged in the update flash drive and left it for a couple hours. When I came back it was on the V logo and has not progressed passed it since. THEN I tried heating the CPU, didn't help. THEN, I tried freezing the eMMC as you suggested. And now I'm here.

It never said it was updating or even acknowledged the drive being plugged in but I left it anyway. I don't know if it actually tried to update and that caused it to stop booting past the V logo, or if being on and frozen for so long made it automatically reboot and brick.

Edit: I looked back and and see in post #4 I said I was going to heat the NAND. I DID NOT do this tho, I only heated the BGA.

[Diah]

if yours set as photos and title on first post and you did freeze then you do have other things... but..

[x_orange90_x]

this set with chrom cast OS no recovery or UART / order to reset... the MT CPU are the heart... eMMC saved the firmware on.. and Rams. he did heat the MT SPU and i wrote this is not BGA issue... freeze will pass any bad sector then he will have access on the syystem via the menu... but now it look he did heat the eMMC too... so its no more luve. the bad sectores will die and be out from the chips... and this we did said many time... if yours issue on firmware never heat it.. just freeze it

OP: i am not mad on you or any... but whom seek professional quid and help need from him / her side also professional answer upon any request.

I appreciate all you have helped me with. To clarify, I have NOT heated the eMMC. I only heated the CPU previously.

1. Heat CPU - no change
2. Froze eMMC - little/no change

That is all I have done to this board

[Diah]

No amount of freezing and heating will help here, a good programmer for emmc will help here and have a working dump (this is despite the fact that emmc is still alive) or try logging in via uart and using the terminal to get into recovery and do a full reset (and again same if emmc is alive) or replacing the motherboard with a working one.

this set with chrom cast OS no recovery or UART / order to reset... the MT CPU are the heart... eMMC saved the firmware on.. and Rams. he did heat the MT SPU and i wrote this is not BGA issue... freeze will pass any bad sector then he will have access on the syystem via the menu... but now it look he did heat the eMMC too... so its no more luve. the bad sectores will die and be out from the chips... and this we did said many time... if yours issue on firmware never heat it.. just freeze it

OP: i am not mad on you or any... but whom seek professional quid and help need from him / her side also professional answer upon any request.

[x_orange90_x]

MANN... i hate this way... yours TV under yours hand.... photo of yours original boards i could see issue for yours eyes and brain.. not to catch or discover..... ... good luck then.... go buy the same photo you uploaded ..
i never answer any post the owner just keep write and follow his mind.. its worthless...sorry.

I'm guessing that means you're mad at me..I gave you the best picture I had on my phone because I'm not next to my bench.

lotas ya I'm trying the suggestions I get because apparently everyone has had different outcomes in this situation. There's a few different boards for this model and I found one that physically matches but one digit was different in the model number.

[lotas]

No amount of freezing and heating will help here, a good programmer for emmc will help here and have a working dump (this is despite the fact that emmc is still alive) or try logging in via uart and using the terminal to get into recovery and do a full reset (and again same if emmc is alive) or replacing the motherboard with a working one.

[Diah]

MANN... i hate this way... yours TV under yours hand.... photo of yours original boards i could see issue for yours eyes and brain.. not to catch or discover..... ... good luck then.... go buy the same photo you uploaded ..
i never answer any post the owner just keep write and follow his mind.. its worthless...sorry.

[x_orange90_x]

show me clear high resolution photo complete of the MB

Not the clearest but it's readable

[Diah]

I'm not sure how to do that. I can plug my thumb drive in and turn the tv on but as far as I know you are supposed to get a message asking if you want to update.

show me clear high resolution photo complete of the MB

[x_orange90_x]

so the firmware didn't load complete... try to or upgrade firmware while you keep freeze the chip

I'm not sure how to do that. I can plug my thumb drive in and turn the tv on but as far as I know you are supposed to get a message asking if you want to update.

[Diah]

so the firmware didn't load complete... try to or upgrade firmware while you keep freeze the chip