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You have to check the connection from the TCON Board to LCD panel. Sometimes Bad contact can cause such problem.
If you wish to get some details; check the site linked here. Pull up older posts. http://electro-medical.blogspot.com/
All TV have boards that control vertical and horizontal output to their respective areas. They are connected to the screen by ribbon cables. If one of these boards fails all together, has a failed chip, a bad connection, or a bad ground somewhere it will result in a black line in the area of that board. A bad ribbon cable connection on the bottom will result in a vertical black bar though the screen. Many times reseating the connection will fix it, if the ribbon cable has been nicked there could be a severed connection. They an sometimes be fixed, but it is a pain. An yes I have done it, but the bar is gone. The same will happen if the chip that outputs to that area opens. The connectors are the first place to look paying close attention to the cable, they are extremely delicate so great care must be taken if you decide to tinker with em, the usually have lift locks that release them, but it is very easy to wreck em.
are these lines vetical or horz if they are vertical your panel has failed and will need to be replaced big bucks if they are horz , then it could just be the T-con board and you will need a tech to confirm this I have seen this problem cause by a poorly seated connection
The horizontal line indicates failure of vertical section, checkout the output capacitor of vertical-section connecting to the yoke (vertical) for any loose contact, dry solder, capacitor wear-out.
Need to check the register and filter capacitor that powers the vertical-section.
1. VERT JITTER/HORZ UNSTABLE-CHECK 'GE' CONNECTOR PIN 5 FOR 1VPP Y SIGNAL INTO PIP PCB THEN CHECK 'GE' CONNECTOR PIN 11 FOR 1VPP Y SIGNAL FROM PIP PCB. IF SIGNAL AT PIN 5 IS GOOD AND PIN 11 IS CLIPPED OR REDUCED. CHECK ALL ELECTROLYTICS (I.E.C7001, C7014, C7026, C7036) AND ALL CONNECTING TRACES TO THESE CAPS FOR CONTINUITY 2. HORIZONTAL TEARING, VERTICAL JITTER. SIGNAL RELATED CONDITION. APPLY FOLLOWING CIRCUIT CHANGES ON PCB-SIGNAL: A. REPLACE R2K8 WITH A 1K RESISTOR (BASE OF Q2B2). B. REPLACE R2K3 WITH A 47 OHM RESISTOR (IC201 PIN 50). C. ADD A 100PF CAPACITOR FROM BASE OF Q2B2 TO JUNCTION OF R2L0 AND R2K6 (GROUND).
Did the set have convergence problems before picture left? If so then you can unplug the conver. Bd and see if set comes up then this will tell you where the problems lies. Or you can check IC902, Q800-810 D655
This is not an easy fix for most people! I suspect the ps is blown, R607, Q601,Q602 (use all org Sony parts, lots of factory 2nds around). This stuff blows to protect the fuse!!!!! Very rarely the input bridge rectifier or filter cap short. Check R622, if open or discolored also replace VDR601(doesn't go bad very often). Check Horz output Q502. Inspect whole board for any bad connections, all parts with heat sinks(regulator ICs). Horz driver transformer, 0.47uf to horz driver tr. There could be other parts bad (flyback??). Make sure no supplies are shorted, check audio output supply, vert output supply, etc. Easily $150 repair at a shop. Good luck!
generally buttons are located at front only.
but if it is not there then it will be inside in the shape of small variable res. called preset.
vertical hold button will be near vert.section &horz hold near h/ section.