I have a TCL LE55FHDF3300Z 55" LED backlight LCD, just over a year old. Left half on the picture is very dark. I discovered all the backlight LEDS on that half side of the screen were not on. I noticed the driver board for the backlight LEDs had two outputs, one for the left side of the screen and one for the right side. Soooo I switched the wires from left to right and found that there was no change. Hummm, board must be OK so that just leaves the LEDs. I noticed when the set is powered up, ALL the defective side of LEDs do all come on in a very limited brightness for about one second then they shut off. I need to know how these things are wired to do any more checking. Unless someone can tell me what my problem is.
Lcd tv sets are lit by small glass florescent tubes called cold cathodes and, are powered by: ballasts called inverters... these go out just like your office florescent lighting the parts can be purchased online from electronic parts houses and, are easily replaced
SOURCE: I have a Toshiba Regza
Please start by looking at the power supply module first, look for caps with leaking/bulging tops, report back what you see so we can guide you further. Posting pictures will also help (use Insert Image icon, the one next to the right of YOUTUBE ICON).
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make a kit for you.
SOURCE: Audio is fine but picture
You have bad electrolytic caps in the vertical section, if you replace the caps in the vertical section it will work fine.
if you had audio i wold say its most likely the Tconn or its upper two connections to the Panel itself. But since you dont have any sound either I would assume its either the LVDS cable from the main board to the Tconn or the Main board itself as audio and video are produced on the main board, You can get replacement boards from www.tvrepairworld.com
SOURCE: TCL LE46FHDP21TA Has picture on left side only
Backlight inverrter board failure. Check and replace it. If you wish to know more details about how to check the backlight inverter and bacl light LEDs,http://electronicshelponline.blogspot.com/ Check this link. Working principle, and testing method to LED back light are given in detail with illustrations. Pull up older posts there. If you want any more assistance, be free to comment by Fixya.
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