After change of the T-con brilliance is too low

Question edited for clarity.

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You have to change the t con board of the tv. Even after replacing the t con (added image of the t con )board the problem exist the you have to change the lcd panel. What ever it is you have to change the t con board to confirm.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
http://electro-medical.blogspot.com/

Tcon

LCD TV Repair Tutorial Con Board Common Symptoms Solutions How to Replace...

how about the backlight have you been check if some parts are not working or need replacement.

It might not be a fault with T'Con board, I assumes. Check the ABL circuit well, before replacing T'Con. In fact, the main digital board to your TV need a through checkup. It is a skilled work. If you are not so sound in electronics, it will be best, either contact a service person, or authorized service center.

Here's a place where you can purchase a T-Con board. TV Parts Universal TV Stands DLP Chips ShopJimmy

This will not be easy to be 100% correct as to what part is bad as you can see in my pictures here.
It can be bad main board, T-CON board, Bad LCD panel.
http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

I would try new T-CON since it is the cheapest part, not worth to repalce LCD panel.

Basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: www.interliquidparts.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

You need to try the following:
Check the power supply caps and voltages. Reseat the ribbon cables between the T-CON board (Timing Control board) which drive the LCD panel rows and columns, it get the LVDS (Low Voltage Differential Signals) form the main board which has the VIDEO processor to drive the T-CON board.
When T-CON is dead you will see glowing screen without video, or when it has timing problem you will see lines, rolling, multiple pictures, pixelating.
The main board supplys switched 12vdc to power the T-CON board.
You need to do more checking.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.

Check to see at one of the pin on the inverter board has 12vdc feeding it. No bad capacitors? Pictures?

The LCD Panel is defective. The problem is the T-con board that is used to decode the signal from the main board to the LCD Panel. The only way to fix it is to replace the whole LCD Panel or T-con board if possible. The T-con will cost about 1/10 of the price as the LCD panel but except for a few new models, the T-con is not available. The LCD Panel is very expensive (usually from $600-700 for a 32" Sony).

The reason is that Sony makes the T-cons for each individual TV with different specs to match that of the LCD panel because of the low threshold for error between the LCD Panel and the T-con.

If it stay dim, it's the inverter board. Inverter boards control the brightness on laptops.

I purchase them from here:
http://www.smartmicrousa.com/


You may have to copy and paste the link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe



I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309