Thin white line on screen

You got a bad LCD screen. no immediate resolution aside from getting the LCD replaced. if your system still has warranty call Dell for replacement.

Hope it helps!

Check for open capacitors in vertical output circuit I believe 47 uf.

take it to a tech.because the diagonstic is dangerious and it won't be a simple job.could be everything & anything electronic.

bad vertical chip ic

I fixed the problem by taking it to a repair shop

Sounds like the flyback transformer is bad. couple of 100 dollars if it is that

your problem is in red video circuit. please get it done with skilled tech.

try to adjust the screen control in the flyback transformer. good luck

These beasts are monsters to get into and service without the proper extenstion cables and a service manual. there are no user replaceable parts inside this set. if you know solid state serviceing, you can try and fix it. There is a bad capacitor or capacitors in the vertical sweep circuit and or the vertical output IC is bad also. If you can solder and unsolder go for it. But if you do not or know how the circuit Works Please find a trained tech to assist you with this repair. Good Luck. PS please do not forget to rate this.

1.Are these lines only in the upper 1/3 rd portion of the screen?And is there a clear demarcation between this area and the lower portionb, where the image is perfect? 2.Or is thin Horizontal lines evenly spaced around an centimetre apart? If it is the first case, then there si a problem with your TVs SMPS. It is not generating the required regulated 110V required for the TVs functioning. If it is case 2, then there is a simple adjustment at the back - 'SCREEN'. This adjusts the Screen Grid Voltage, and by slightly lowering it, this problem will go away.