Question about Televison & Video
On my sony lcd tv that i have the top half of the screen seems to be much darker than the bottom half. I have tried resetting the settings, and adjusting the contrast all the way up. I also noticed that the when adjusting the screen pic it will sometimes staticy/flickery on the edge. Almost like the graphics driver for the lcd is going bad, like a bad video card in a computer. I know alot about desktops/laptop computers, but the insides of an lcd tv i am more or less clueless overall.
Any help would be great appreciated
The problem is most likley the TV backlight - it is very unlikley to be the graphics card or video input or any other circuitry within the TV.
Also, the problem can be manifested by flashing or flickering of one or both halves of the screen, and sometimes it is a left/right split rather than a top/bottom split, depending on where the lights are positioned. Before failure, you sometimes hear a very high frequency buzz for a few weeks before it fails - the frequency can't be heard by most adults as it ranges from 15kHz-25kHz, but children\animals can usually hear it.
Generally you will need to replace the backlight tube or the invertor that drives it. Generally you can identify the backlights as thin glass tubes buried deep within the panel itself usually with one wire going to each end of them - they are very fragile. The invertor is connected to the backlight tube and looks like a circuit board, often containing a high voltage warning. Usually there are two or four conductors connecting the invertor to the tubes, which can be identified as thicker individual wires as opposed to the flat ribbon wire used for data for the actual image displayed on the screen.
On some screens you may be able to unplug\swap one or both tubes to identify if it's the tube or inverter.
Posted on May 03, 2009
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Aug 03, 2015 | Sony KLV-32BX300 SERIES BRAVIA LCD...
Dec 17, 2012 | Sony Bravia KDL-40S4100 40 in. LCD TV
Dec 01, 2012 | ViewSonic N3735W 37 in. LCD TV
Nov 09, 2010 | Sony BRAVIA KDL-40S2010 40 in. LCD...
Apr 24, 2010 | Acer AL2216WBD LCD Monitor
Nov 01, 2009 | Sony BRAVIA KDL-46S2000 46 in. LCD HDTV
Nov 29, 2008 | Proview PL926WBi 19" LCD Monitor
Jul 08, 2008 | Televison & Video
Nov 01, 2007 | Sony BRAVIA KDL-40S2010 40 in. LCD...
1,655 people viewed this question
Usually answered in minutes!