Samsung UN60F6300AFXZA interesting dark spot in picture

[jeffer76]

Customer gave me this tv to tear apart so I could figure out what is causing the spot in the picture. This is the third time I've seen this problem (other two were Sharp 70"). I thought it might be that the backlights were overheating damaging the plastic screens, but after tearing the tv apart I found the backlights are all functioning just fine and the plastic covers behind the screen are good as well. (ran tv without lcd panel on it)

I reinstalled the screen but left the ribbon cables disconnected. could not see the spot when using the backlights to see through the screen. When I reconnected the ribbon cables to the screen I get the spot. Was able to lift the lcd panel while it was connected to the tv and the spot is definitely on the lcd.

I can only assume the LCD panel has a bad section of liquid crystals. Cant imagine any way that the t-con or video circuits could cause such a spot on the screen.

Curious if anyone else has experienced the same symptom and your thoughts on the situation. Thanks

[jeffer76]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

[ReeceyBurger123]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Hmm if you shine a light on the area can you see the image on the screen like shadowing ?

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

its easy to confirm this black spot, as its at the middle, by disconnect one by one the ribbon cable to see the white half screen. also by setting menu, service menu. if they show normal, at the end from your photos of the T-CON the left ribbon cable look had deep scratch. take look on it.

[jeffer76]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

I disconnected the left half of the screen (looking from the front of the tv). Got a white picture. (Picture 1). When disconnecting just the right side, the whole picture goes black. After reconnecting the right side of the screen, the spot had grown and now reaches all the way to the left side of the picture. I kept messing with the ribbon cables on the right side and now I have a black screen with a white spot where the dark spot once was. There is video in the white spot, but it's very blurry and washed out. I either damaged the LCD screen further or damaged the tcon when connecting and disconnecting the ribbon cables. Probably should have turned tv off while messing with the cables.

[jeffer76]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Now it looks like this.

[SLK001]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Water intrusion? Was the TV use outside?

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

its easy to confirm this black spot, as its at the middle, by disconnect one by one the ribbon cable to see the white half screen. also by setting menu, service menu. if they show normal, at the end from your photos of the T-CON the left ribbon cable look had deep scratch. take look on it.

did you read this black block and checked ?

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

this ribbon cable its exactly the right side one when you take look at front of the screen..

[jeffer76]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

No water damage. Tv was clean. Looked at picture and saw what does look like a scratch. I will have to take a look at that ribbon cable.

[jeffer76]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Inspected cable. Photo had a glare. Ribbon cable is good.

[Moreno83]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Hi Jeffer ,

I got a philips lcd ( ambilight ) that does a similar thing. In my case its a bad panel ( tab bonding ). I get a black haze/spot on the screen...looks washed out. If i apply some pressure on the panel it will go away. ( too lazy to repair ).

On this tv it's either a bad panel or T-con. Im suspecting the panel. Did you check the tab bonding? Turn on the tv and apply pressure on the tabs and see if it goes away?

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

plug your tv out from wall socket, and take out both ribbon out, turn the tv on for 1 minute ( this reset T-CON parameter to default ).. then plug it out again from wall socket , then keep press power bottom on the set for 10 seconds, , then release it, wait other 1 minute then put back the ribbon ( here you can reverse them, left to right ) and plug in and tell how picture

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

by the way,, what is that in the T-CON middle as marked in the photo, i never saw this before,, any one know ?

[ReeceyBurger123]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

by the way,, what is that in the T-CON middle as marked in the photo, i never saw this before,, any one know ?

Thats not part of the Tcon its the led strips under it.

[Moreno83]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Looks like a ground cable..... not seen it before.

EDIT: Nevermind , Reecey know haha

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Thats not part of the Tcon its the led strips under it.

???? led strips cable are black color and can see going out from PWB

[ReeceyBurger123]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

???? led strips cable are black color and can see going out from PWB

No its the back of the copper for the Led strips lol

[Diah]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

No its the back of the copper for the Led strips lol

why they do it same color of ribbon cable if they not related to T-CON... don't tell me fashion show LOL

[ReeceyBurger123]

Re: Samsung UN60F6300AFXZA interesting dark spot in picture

Omg ask the op to take the Tcon out if you dont believe me jeez lol