How much will it take to fix a cracked membrane with vertical lines on it

I hate to give you bad news but I believe this will be a panel issue and it's not going to be fixable. You can try a different tcon board but I don't think it will help

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www.fixya.com/.../t12061168-lg_50pk550_plasma_single_thin_green

Mar 10, 2008 - Posted on Mar 17, 2012.

Vertical output has cracked soldering. Around $150 to fix.

If ther membrane has been damaged it will need replacing, there is no magic glue for this.

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If the main PCB is not cracked too bad, it should not be expensive to repair. You have lost vertical deflection causing the flat line.There may be a crack at the flyback, where the vertical IC gets its operating voltage, or a crack at the pins of the vertical IC itself.

This is a common problem amongst DS lites. It won't go away but it doesn't affect anything so just ignore it.

The lcd ribbon cable is cracked and must be replaced
this is a common problem with this model I have fixed over 100

You possibly have a cracked solder joint in the vertical circuit, possible the vertical Ic itself. You'll have to remove the board and look carefully at the soldered connection of the vertical circuit and see if any are ring cracked. Some soldering should fix the problem. If you let the problem go too long the heat these cracks generate will eventaully short the vertical Ic..
Bill

thats a sign of vertical deflection failure. Try resoldering the vertical output ic. The fall may have cracked the vertical output solder joints or cracked the chassis in the vertical section circuitry.