black line on tv plasma

[tornedoar]

i found 3 transistors in X-main board has short circuit so i changed them and now my samsung plasma tv work but has black line on screen and that line not moving at all it is just stay on same place and when the tv off i cant see any lines, so could anyone help me to do and if that because panel or some board or ics?
after i finish i will share my experincess with you or as video on youtube.

[tornedoar]

this the screen

[tornedoar]

mm none can help?

[shakalnokturn]

I've had a similar case before, single black line, without the multiple thin ones you have.

In my case it was one of the line drivers gone defective (usually spread out over 2 PCB's on one side of the TV) sometimes they will burn a small hole in the top of the TQFP package, sometimes the PCB will fuse a power supply track leading to the defective driver IC, otherwise you'll just have to deduce which one is the culprit from the number of drivers and the position of your blank line.

In my repair notes I found that I had replaced a defective AN16021AA by a SN755866, a couple of years later the same TV came back with another dead AN16021AA.

Some PCB preheat is useful when replacing these IC's the PCB's usually have large ground planes to dissipate heat.

[tornedoar]

I've had a similar case before, single black line, without the multiple thin ones you have.

In my case it was one of the line drivers gone defective (usually spread out over 2 PCB's on one side of the TV) sometimes they will burn a small hole in the top of the TQFP package, sometimes the PCB will fuse a power supply track leading to the defective driver IC, otherwise you'll just have to deduce which one is the culprit from the number of drivers and the position of your blank line.

In my repair notes I found that I had replaced a defective AN16021AA by a SN755866, a couple of years later the same TV came back with another dead AN16021AA.

Some PCB preheat is useful when replacing these IC's the PCB's usually have large ground planes to dissipate heat.

thanks bro you are right, I just check some lines and i fixed it and now the tv work well without high temperature, it is high but it is normal.
but I just saw that black line turn to red lines when tv working you will not notice that, but if you focus well on it you can see it, so what the problem do you think? I am thinking seriously about buying new y-buffer, is it could work?