3" shadow on left side of screen

Line fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Either (on this plasma) a damaged/bad sustain board for left side of screen or a problem with the Display panel--set by model number is 5-6 years old so may or may not be worth fixing.

If you mean that the left side of the screen goes darker than the right side, then this is an indication of a faulty backlight. There are probably two CCFL tubes, one on each side of the screen. If one starts to fail, then that side of the screen will get less light and look darker. The tube may need to be replaced.

bad convergen ic , u need to repair the convergence ic normal repair is abou $250

The band or shadow on the left side of the screen definitely sounds like a defective light tunnel.As for the intermittent pix and shut down this could be the lamp if you have not already changed it.

THE SCALAR OF YOUR LCD ARE LEAK IT'S RECOMEND TO REPLACE A NEW ONE LCD

its a LCD connectors. re-connect it properly. some loose connection.

This can be the sync wheel assy, failure in the drive circuit for the display chip, or an illumination fault. You will have to give the set out for service.

Jerry G.

I have the same problem and was told by a technician that I need to replace the light engine. Probably around $ 700.00.

i beleive its electrical problem (horizontal circuit). if u are not inclined with this job just bring it there and besides they will give you warranty for their work.