Vizio XVT553SV - Up for sale

[jason123]

Hi, in our local community, someone has this TV up for sale.. I am wondering if anyone has had this issue and know what it could be? I realize it's tough based on a picture.

I've worked on similar TV, and it's always been bad main baord - I would send it out for repair and $110 later, it works.

Does this look like a main board??

It's greenish tint and pixelized - as the seller described it.

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Gamma issue with tcon??

[jason123]

Re: Vizio XVT553SV - Up for sale

Gamma issue with tcon??

Worth trying out another Tcon?

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Maybe if you can get the tv for a reasonable price in case it's something else wrong, there's some tcons on ebay about 25 bucks and up, might be able to replace gamma chip on tcon IF that's the issue, a lot cheaper but requires soldering.

[jason123]

Re: Vizio XVT553SV - Up for sale

Thanks.. got one for $21 including shipping and taxes.. will keep you updated. Got the TV for free.. so I can't complain.. the remote alone is $25

Thanks

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Cool, that's my favorite price.

[R_J]

Re: Vizio XVT553SV - Up for sale

Looks like there are no gamma test points on that board to check the voltages

[jason123]

Re: Vizio XVT553SV - Up for sale

Hi Folks.. I got the new / used Tcon today. Symptoms are still the same. Seems symptoms go away once the boards heat up. So before I invest in more boards (main boards is fairly expensive), I would like your opinion if this could be a panel issue and I should give up? Video attached. Most repair shops for this model, don't list this as a failure mode of the main board

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Wondering if anyone has been trying to fix it before, what is your full panel number?

[budwich]

Re: Vizio XVT553SV - Up for sale

Hi Folks.. I got the new / used Tcon today. Symptoms are still the same. Seems symptoms go away once the boards heat up. So before I invest in more boards (main boards is fairly expensive), I would like your opinion if this could be a panel issue and I should give up? Video attached. Most repair shops for this model, don't list this as a failure mode of the main board

try selectively preheating (with a hair dyer, gently) one of the boards, then try start it up and see if things work right at the start. Let cool off, and repeat til you locate which board is most impacted... go from there.

[jason123]

Re: Vizio XVT553SV - Up for sale

Wondering if anyone has been trying to fix it before, what is your full panel number?

Looks fairly uniformly dusty and tape still intact. It doesn't look like repairs have been attempted.

See attached of all numbers, and main board number

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Probably that damn amtran mainboard at fault, lol.

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Did you try the heat in post #10?

[jason123]

Re: Vizio XVT553SV - Up for sale

try selectively preheating (with a hair dyer, gently) one of the boards, then try start it up and see if things work right at the start. Let cool off, and repeat til you locate which board is most impacted... go from there.

Yes, heating up the main processor on the main card does the trick.

would reflow take care of the issue, or does the processor have to be removed / reballed or replaced??

[budwich]

Re: Vizio XVT553SV - Up for sale

good deal... as you were focused on the tcon when the main board was the "source". Hope you can get it going properly.

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

Worth a shot, use your hot air gun probably set to low, to melt a little piece of solder, see how long it takes then add about 30 or 40 seconds to that when you do your re-flow.

[diif]

Re: Vizio XVT553SV - Up for sale

Don't forget to add flux.

[jason123]

Re: Vizio XVT553SV - Up for sale

Reflow completed.. Board cleaned.. symptoms have disappeared.. how long will that last?? fingers crossed. Thanks folks

[nomoresonys]

Re: Vizio XVT553SV - Up for sale

I believe it was diff that said as long as it took to malfunction, it's a 2010 so it should last 10 years.