Hisense H55U7B vertical stripes

[Davi.p]

Ok to be more precise, needs to replace completely the old solder, If my suspect Is right...

pS:
to have a confirmation, the half test image gets Better with the passing seconds?
My suspect Is now different, i think you have problems with the cof Tab where the half connected side displays only bars and no image, leave alone for now the task of resoldering, try this other task, keep a freezing air can or compressed air upside down or butane gas, freeze a lot the cof Tab more towards side and with all connected test normally the TV..

[Diah]

scarp it

[lotas]

And what will happen when using butane gas when freezing the chip and turning on the TV, a small spark and there is no owner of the TV and apartment!

[nomoresonys]

And what will happen when using butane gas when freezing the chip and turning on the TV, a small spark and there is no owner of the TV and apartment!

+100, Thats just about what would happen too.

[Davi.p]

I don't know what you are complaint of Lotas, butane is very volatile, he will turn on the set surely after no more gas is around.. it takes few seconds.. we begin again with these sterile polemics, with the "known party pooper" around like vultures..

PS: The vulture here criminalized a website change and telling he disapper from here and 5 min. he are here again crushing the olives to me and the staff.. in italy it is called "uomo di m*rda senza orgoglio"... how can this happen?!

[nomoresonys]

So this monkey has his nose out of joint again...just because I agree with someone that his "testing" suggestions are hazardous. He IS INDEED just a joke.

[nomoresonys]

complain complain complain yada yada ...So how do I get davi back on the IGNORE list??

from admin - go to your profile and then edit your settings. under accounts you can add to ignore list

[Document Archive]

Just to address the experts on this post complaining about the new layout. previous vbulletin had major security issues so there was no choice to upgrade. I have made alternate (including dark mode) available in the footer and will release more soon.

As for being ad revenue orientated. this site makes a significant loss each month which is only partly subsidized by ads.

[halen]

Hi again, I did all test, try to freeze bad side drivers, all drivers r+l and finally all together with tcon and no change. Still same stripes. When I connect only 12V to the tcon, then good side switch ok, bad is switching slowly and took some time to get to final color. I have microscope and checked joints on tcon bga and it's seems ok.

[nomoresonys]

I wouldn't worry about freezing it, it's not really a reliable test anyway.

[nomoresonys]

Just to address the experts on this post complaining about the new layout. previous vbulletin had major security issues so there was no choice to upgrade. I have made alternate (including dark mode) available in the footer and will release more soon.

As for being ad revenue orientated. this site makes a significant loss each month which is only partly subsidized by ads.

Also not the first time I have heard this COMPLAINT, I hope your other business ventures are profitable so you can write all this off.

[Davi.p]

when the self test is running slowly, does the tcon main chip over heats? No other reasons to getting slow, but the panel is the overload that makes it working bad, maybe a bad discrete on the panel strip board..

[halen]

No, it's getting slow immediately after powering on. Good side switching normally and bad side is slow to get final color. I mean when it's connected together left+right. And of course when I connect only bad side it's slow too. It doesn't matter.

It's not overheating, temperature seems normal. I checked everything on driver board, no shorts or bad values.

[Davi.p]

remove carefully with hot air the diode packs on the bad side, it's difficult to represent in mind exactly how is the issue but i think i have it in mind now.. if you watch carefully the top or bottom side you see probably a marking line where over that image is better... (?)
when the test colours are blurred, its the time where diodes leaks a current and losts syncs on clocks.. you can also try to freeze those diodes..

[halen]

Thanks a lot. Removing protection diodes make the job. Picture is back. So one of them were bad. I will replace them.
Thank a lot Jan

[lotas]

Thanks a lot. Removing protection diodes make the job. Picture is back. So one of them were bad. I will replace them.
Thank a lot Jan

I wrote about this in post 11.

[Davi.p]

Now the curiosity corner, for me.. does the metal shield for the strip boards touch well with strong electrical connection with the screen back chassis? It's important that it does it for the esd..

[halen]

Driver board earth is connected by conductive tape to the chassis. And I measured it and it's ok.

I know about post 11, but I measured by meter if there is some bad resistance and nothing bad at this test.

[Davi.p]

No i talked about the metal frame that covers the boards, it's important for the esd

[halen]

Yes, it's attached to the main frame with 6-7 bolts. Another question where to get SP1064E-04UTG Tvs diode component. Or some alternative on AliExpress. Because I found one in Mouser, cost low, but shipping of parcel costs a lot.