Issue on DC/DC chip on Samsung UE55MU9000 motherboard

[totof]

I just ran a test by attaching a small heatsink to the VPM1GMA component. The vertical lines eventually appeared, but after 4 to 5 minutes instead of one.

Since the output voltages of the component are stable, I don't see what else I can test. Cooling it with a freeze spray restores the image to perfect condition.
I could try replacing the VPM1GMA component, but it's impossible to find. Is it compatible with VPM1RT, VPM1R0A, VPMS2RT, or VPMS3RT?

[Davi.p]

Your head is hard enough to break the stones..

[totof]

Your head is hard enough to break the stones..

I'm not really surprised by this latest pointless and uninteresting intervention from you. Is there a competition for this type of response ?

[Davi.p]

no competition surely, but your myopia is disarming, there are no info in these China chips, also the stone knows, i surprise myself when people still asking schematics and so on, you can try one blindly or use your imagination..

1) not listening all suggestions
2) evidence of no info > try lottery and get one chip
3) put tv aside a wait a spare board..

[totof]

I'm sorry, I just realized I should have said thank you Mr. Know-It-All.
I remain interested in information for my problem, even from people less expert than Mr. Davi.p :-)

[Repairtechlcd]

You may have a problem with one of the source COFs or caps on the scalar boards that is drawing to much current.See if you can give them a quick a look with your thermal camera.By the way what kind of panel is the TV using.

[totof]

You may have a problem with one of the source COFs or caps on the scalar boards that is drawing to much current.See if you can give them a quick a look with your thermal camera.By the way what kind of panel is the TV using.

I'm not sure what you mean by kind of panel.
I checked the caps and none of them are overheating. COFs have roughly the same temperature, around 60 degrees Celsius.

[Repairtechlcd]

I'm not sure what you mean by kind of panel.
I checked the caps and none of them are overheating. COFs have roughly the same temperature, around 60 degrees Celsius.

I mean the manufacturer of the lcd panel.

[totof]

Screen Number: CY-UM055FLLV1H

[bohaboha]

Screen Number: CY-UM055FLLV1H

Hi since many Samsung mainboard are compatible to other models i suggest to call Samsung support about the VPMS chipset to find out a compatible one