My lg screen is no longer as bright as the picture should be. Sound is okay, but the picture keeps getting darker

The LCD has quit working and the screen is no longer working for your TV.It would be more easier to purchase a new TV than to try and fix the TV that you have that is broken.

If CCFL lamps are weak, this might happen. Check the control voltage comes to backlight inverter board from the main board too. It should vary according to increase in brightness.

If it happened gradually I would suspect the lamp--a photo posted here might help.

The other possible cause in a Optical light engine which might be very expensive to replace in this brand.


Typical light engine:

Possible screen controls in the set are up too high---if you turn picture and brightness to zero does the screen get full black?

screens set too high would give diagonal faint trace lines in the picture.

These sets also should get a annual cleaning of the lens and sometimes the mirror inside= if this is the case the picture will usually look darker and dull ----this will not affect lines in picture.


the lens are easy to clean but other actions depend on what your response is to the above information.

Light Engine/optical block
Encompass Parts Distrubtion 1-800-638-3328

If you have never changed the lamp this is more than likely the issue, as the tv ages the lamp looses brightness. Most lamps are rated for 3000-5000 hrs of use. Replace the lamp assembly part # UX21514 and you will notice a much brighter picture. You do not mention if the tv plays the right colors on the entire screen. These have had light engine issues.
Good luck with it
JOTVGUY

turn the screen up a little on the flyback..

Yes i spose it is a tenical fult there is nothing you can do i had loads of theses problems in the past working fo r bill gates and a major computer fixing service

most monitors get darker with age -- for a while you can counter this by turning up the Brightness and Contrast controls, but this only gives you a little extra time (and probably speeds up the decay process anyway).

the lamps have to come out. the fluid has to be sucked out from the bottem.