Lg 50pq3000 bootom half good image top bad

[Cobblers]

Ok, so somehow ive done this to my tv. It did have a different fault that was the control board. I replaced it it came on fine once. I turned it off then before rebuildi g i decided to resolder all the mosfets on the 2 sus boards. After putting it back together the screen looked like this.

I checked what soldering i had done and could not see any problems. The voltages are all still reading fine. Can anybody give me any pointers to what i may bave done wrong or what i have damaged?

I want to learn from my mistake and hopefully try to fix it if it is fixable. Cheers.

[ReeceyBurger123]

Re: Lg 50pq3000 bootom half good image top bad

Are all cables in place properly ?

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

Yes everything looks good

[ReeceyBurger123]

Re: Lg 50pq3000 bootom half good image top bad

Ok and thats definitely the correct Tcon for it ?

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

Exactly the same numbers yes. It came on fine at first till i meddled with it. After the fault happened i took the tcon of and i noticed a fault with it. A surface mount component on the back c295 was loose and touching c293 next to it.

Could that have cause this fault? I have since reflowed the original tcon after someone suggested on the last thread the his tcon had stopped working due to cracked solder. That tcon now works again aswell but the same fault is present with the screen

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

Is it possible i damaged the tcon ribbon cable that goes to the y drive? Is the cable reversible? They are quite firm to push in maybe i broke some connections?

[Alastair E]

Re: Lg 50pq3000 bootom half good image top bad

Are you opening the plug catch before removing/inserting the ribbons??!!

NO pressure is ever needed with 'em!!

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

There does not seem to be a catch on the ribbon from the tcon to the ysus. All the others have catchs

[ReeceyBurger123]

Re: Lg 50pq3000 bootom half good image top bad

There should be.

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

Ok some more images of the screen this time with auto gen jumper in and x sus disconnected. Top half of the screen totally blank. Does this suggest a faulty top buffer or a power issue? Does anyone have any ideas of what else i can check? Thanks.

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

There should be.

This is the connector for the y sus ribbon.

The bottom ribbons have catchs

[Cobblers]

Re: Lg 50pq3000 bootom half good image top bad

According to the service manual half picture is either caused by x. Sus board or faulty panel so maybe i should check that?