Vizio D500i-b1 horizontal lines

[andrew_212]

So i seem to have a issue with my tv. I picked it up for free knowing it had issues, owner just wanted it gone. So basically the problem is there are horizontal lines across the screen black and green some red in there somewhere. I think its a bad lcd but it could also be the T-Con board. Usually with a bad lcd twisting and turning and playing with the conectors usually does something with it but it did nothing. Didn’t make it worse or better, so I ordered a t-con board and I’m hoping for the best. Mind you I only paid $6usd for the board so if it doesn’t work then it’s not too bad of a loss.

So my question to everyone is what do you think is wrong with it? I haven’t put the board in yet because I’m waiting for it to come in the mail. Thank you guys in advanced

 

[andrew_212]

MERGED QUESTION
Question from andrew_212 : "Vizio D500i-B1 horizontal lines"

So i seem to have a issue with my tv. I picked it up for free knowing it had issues, owner just wanted it gone. So basically the problem is there are horizontal lines across the screen black and green some red in there somewhere. I think its a bad lcd but it could also be the T-Con board. Usually with a bad lcd twisting and turning and playing with the conectors usually does something with it but it did nothing. Didn’t make it worse or better, so I ordered a t-con board and I’m hoping for the best. Mind you I only paid $6usd for the board so if it doesn’t work then it’s not too bad of a loss.

So my question to everyone is what do you think is wrong with it? I haven’t put the board in yet because I’m waiting for it to come in the mail. Thank you guys in advanced

 

[andrew_212]

A failed T-Con board in general does not cause any horizontal lines. Horizontal lines are most commonly caused by failed Gate Drivers located along the side of the panel. These IC’s are mounted on a flexible cable(s) which are bonded to the LCD panel. Their function is to activate each row of pixels one at a time starting with the first line at the top. The gate drivers are activated by a single source of timing information so any single horizontal line or groups or random horizontal lines are caused by an output failure from a gate driver or a loss of the tab bond to the panel.

Put some pressure on the ribbon cables that enter the panel. See if that removes/worsens those lines. that would indicate a Tab Bond failure. Sometimes that can be repaired by adding some tape for additional pressure to the failed bond.

I have done that and it did nothing, but the horizontal lines barely make it across the screen and some of them flicker so who knows. The part is coming in tomorrow so I’ll post what happens