Vertical blanking Picture has 4 inch blanking strip across the pic at top. At other times, the blanking bar may be in the middle of the picture with the bottom of the picture in the top half of the screen and the top half in the bottom of the screen. Of course it's blanking, sync, picture centering in middle of screen and extending down to bottom and up to top down to middle. This is surely a recurring problem. I replaced the vertical IC451 and seven (7) vertical electrolytic caps. No change

do the proper isolation proceedure and try unhooking the Su from the SC board to see if you then get a normal picture all the way across the bottom half of the screen? I am assuming the Vertcal extends extends all the way from top to the bottom of the screen?

My 3-year old 52-inch Toshiba flat panel TV (Model # 52RV53U, Serial # AM409000295) developed a display issue (purchased Aug. 2008, manufactured July 2008). Vertical multicolored lines appeared on the screen just left of center. The band of thin vertical bars is 5.5 inches wide. The lines are about 1/16-inch wide. They are stationary, always exactly in same place. They over-ride any other picture on the screen (no transparency). They are there all time even with no video inputs to the TV after the unit is turned on. See picture #1. The TV works well in every other respect, but, obviously, it is annoying to watch the picture with the color band blocking about 1/6 of the picture.

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I already swapped out the TCON board with no improvement and replugged the TCON board cables with no improvement.

Most likely it is the flat panel tab bond failure (panel made by Samsung). Further updates will be on my Facebook page.

its a vertical problem could be bad cap or possible vertical i.c. okay take to tv shop is their still a warrany on this set sounds pretty new shad

if the picture shrink into the center of the screen about 4inch then goes blank. you do have problem with your vertical drive IC, it's either loose contact with the board or the vertical IC already malfunction.

was your tv hit hard,a non magnetically shielded speaker set on top or under it?

This is called field-collapse. Either

1. The problem lies in the vertical deflection voltage-doubler circuit. The usual fault is a single capacitor of 100uF/35V that has failed. It is normally connected to a rectifier diode right at the vertical IC. Replacing the capacitor usually gets it working perfectly again.

or

2. The vertical drive IC has failed.

If you are finicky around technical work, then a reputable local repair shop in your locality should do it quickly for you and charge only labour.

hi, the problem is in the vertical ossilation.. let me know

Also info at www.ctechnicians.com

1. VERTICAL ROLLING, VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE, ALSO MAY HAVE HORIZONTAL PULLING OR TEARING. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB. 2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01

1. HORIZONTAL PULLING AND TEARING, MAY ALSO HAVE VERTICAL ROLLING OR VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB. 2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 (9-VOLT REGULATOR) ON THE SIGNAL PCB