SONY KDL-46R473A ALMOST DEAD NO STB

[Diah]

then remove the SoC from circuit, will be first step to know where was the short.

[nomoresonys]

Oh shit my bad, I didn't look close at the chip, it's not bga so no reflow like Diah said. If the caps near a chip read short on the board but ok off the board then a lot of times it's that chip that's bad.

[bohaboha]

[QUOTE=nomoresonys;n3625460]Oh shit my bad, I didn't look close at the chip, it's not bga so no reflow like Diah said. If the caps near a chip read short on the board but ok off the board then a lot of times it's that chip that's bad.[/

well I'll do as Diah has suggested but I have to buy a replacement Chip it's not worth fixing this Tv want to try something and learn

[nomoresonys]

I hear you, probably not worth investing much in. I wonder if one of those cheap universal mainboards would work for this tv.

[bohaboha]

I hear you, probably not worth investing much in. I wonder if one of those cheap universal mainboards would work for this tv.

maybe i have no idea never com over such board .but i will just go on maybe i find that short just for learning even take away that chip as training . or maybe if Nick see this and give some advises would be fun

[CapLeaker]

ok but this one seems to work he is getting a normal temp but of course that old must get tired .but maybe a reflow will take him back to live

Doesn’t mean anything with these Mediatek IC’s. If you search older threads here, you find tons of mainboards with this Mediatek IC that failed just like that.

[nomoresonys]

You have my vote CapLeaker, I would like to see that chip switched out. If you try it Bohaboha, maybe practice on some scrap boards and check some youtube videos for technique.

[CapLeaker]

You have my vote CapLeaker, I would like to see that chip switched out. If you try it Bohaboha, maybe practice on some scrap boards and check some youtube videos for technique.

You got it!

[bohaboha]

You have my vote CapLeaker, I would like to see that chip switched out. If you try it Bohaboha, maybe practice on some scrap boards and check some youtube videos for technique.

i have read so many thread here but none have this model kdl-46R473A and even in Niks video i did not find my model but of course the basic is the same. i found some caps shorted on the boards down side .but just now i have to finish that samsung 70""an other thread here" then i ll take this one

[bohaboha]

Doesn’t mean anything with these Mediatek IC’s. If you search older threads here, you find tons of mainboards with this Mediatek IC that failed just like that.

it is not Shure that Mediatek IC is the fault because i found some shorted caps on the other side of the board so it is not clear yet

[nomoresonys]

Can you post a good picture of those shorted caps?

[bohaboha]

Can you post a good picture of those shorted caps?

here some they are 1each side of that big chip and under it 4 big ones and 2 otr 3 small ones all are short

[CapLeaker]

here some they are 1each side of that big chip and under it 4 big ones and 2 otr 3 small ones all are short

That is not a good sign if the caps underneath the Mediatek are shorted.