Question about Sony BRAVIA KDL-40V2500 40 in. LCD HDTV
This is an LCD TV and does not have convergence, at least not in the technical meaning of the term, or in a way that can be involved in your problem.
The thread you have seen was probably referring to a rear projection or to a CRT TV, where the signal alignment and convergence is controlled by two power amps(the convergence ICs). On those tvs this symptoms would point to a convergence problem.
As first thing ensure that the problem is not caused by defective connected device or bad video cables. Test different devices (eg.DVD, receiver, console) using different cables.
In your LCD TV the video signal is digitally elaborated in the main controller board, the problem is not convergence.
An LCD TV system is basically made of a PSU (power supply), Digital controller board (main board that group most function and send video signal to LCD), and an inverter that supplies power to the backlight system that powers backlight lamps placed around LCD display.
This is a simplified description, but it can give you an idea of how things work.
If dark shadows and not illuminated areas are the first symptoms, then the picture gets distorted, then problem is inverter/backlight system or PSU.
The dark areas in this case are given by a defective inverter, or by a defective PSU not properly powering the inverter. In some case a defective main board may fail and cause the problem. Among other function the main board has control on power line to inverter.(see also Why my TV does not start up and remains in...)
If the dark areas are not caused by a backlight problem, but are instead color or contrast/light anomalies on LCD display, then the problem is either main controller board or PSU. An accessory board called LCD controller must also be tested.
The testing job must be done by a technician or by a trained DIYer, as there is need to read voltages, even high voltage on inverter, while the TV is on and the problem is occurring.
If you need to call a technician you can ring the phone number listed on the Sony owners manual or see Sony eSupport.
My suggestion is: Check cables and connections.
Check power from main, as a bad ground may cause the problem.
Test the TV using an extension and plugging into a different outlet.
Call Sony, if TV is in warranty, get it repaired, otherwise ask a quote.
If quote is too high you can commonly find cheap spares for this on Ebay, and have it repaired from a local technician.
Call sony first, as their customer support and repair conditions are usually very good. You may also have special warranty conditions, as Sony often warranty this TVs for longer than the standard one year.
Posted on Jun 07, 2010
a 6ya expert 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 repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jul 23, 2014 | Sony Bravia KDL-40W4100 40 in. LCD HDTV
May 22, 2014 | Sony BRAVIA KDL-40BX420 40" 1080p 1920 x...
Aug 18, 2011 | Sony BRAVIA KDL-40V2500 40 in. LCD HDTV
Jul 20, 2011 | Sony KDL-52XBR9 52 in. LCD HDTV
Feb 15, 2011 | Sony BRAVIA W-Series KDL-46W4150 46 in....
Oct 15, 2010 | Sony Bravia KDL-46V4100 46 in. LCD HDTV
Sep 14, 2010 | Sony BRAVIA KDL-46V3000 Television
Aug 10, 2010 | Sony Bravia KDL-32V4000 32 in. LCD TV
Aug 01, 2010 | Sony Bravia KDL-46VL130 TV
Jun 09, 2014 | Sony BRAVIA KDL-40V2500 40 in. LCD HDTV
293 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: