Why my t.v screen is one inch less from down side?

Check the power board, where 120 volts enter the TV. After the fuse, there is a small high voltage transformer. And on the other side, there is a capacitor (100 uf rated at 450 volts), check for 390 volts to 400 volts DC. If you have less than 390 volts, change the capacitor. I got two capacitors from old power supplies - 150 uf and 220 uf both rated at 400 volts. I connected them in parallel and the TV is back to normal.

That is not a timing control board problem.

Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

it's the inverter. you can get one here. tvtechparts com

no
warranty does not cover expendable items like glass, brake linings clutch bulbs etc
most screens cost less than the cover amount

settings is in the lower right hand side of the screen, tap there.
display is in the middle of the screen on the left hand side about one(1) inch down from the top of the screen.
the slider for brightness is down one and one-forth inches down from the top of the screen, tap about 1 inch from the left hand side of the screen, remember it is 1 1/4 inches down the screen.
NCMB

Convergence is dead.Replaced the 2 convergence ICS,should solved this problems.Try website Tv repair World.com to buy a Whole convergence board to replaced.Samsung/Akai use the same convergence board.

Hi:
If the line is less then 2 inches wide this us a good indication of a bad PDP panel (Screen) usually very thin lines indicates a failure in the screen itselg, altho you might try replacing the upper and lower buffer boards to ensure its not the screen. You might want to take off the back and try reseating all connectors leading to the buffers and the Digital board. But in my experience thin lines less then 2 inches usually results in a bad PDP.

CHECK THE OPTICAL ENGINE. THEN AGAIN THE LG BRANDS BELONG TO GARBAGE TIP

The dark side of the screen causes of the lamp alignment or prism glass alignment. This is critical you have to consult your LG technician to do this. But if you have any background o repair consult the service manual. Please careful not to touch the prism quarts so that you maintained the clarity of picture and brightness on the screen.