Finally got up the nerve to buy an LCD television. I get it home and set it up and BLAM...huge light spot in the middle. I have adjusted the settings, including the brightness which has helped, but it is still there just as clear as a bell. I am so bummed! I plan on bringing it back and exchanging it but I'm wondering...what causes this to happen????
Back-light bleed through is caused by an improper seal between the edge of the LCD screen and the TV Frame. Back-light bleed through is usually along the edge of the TV's screen, not in the middle of the screen.
The problem that you have described could be "mura"; a traditional Japanese term that means inconsistent. LCD screens (due to quality control issues) can have inconsistent light penetrating the screen. Your TV sounds like an extreme condition of "mura".
Additional details: Nice link in the following response; too bad it's for CRT tube TVs and NOT LCD TVs like that referenced in the question!
Trangle LED Color Glow In Dark LCD Back Light Bedroom Digital Snooze Alarm Clock, 7 LED Color Back Light LCD Digital Calendar Snooze Alarm BEEP Home DeskTop Clock, High-quality 4Band Acoustic Guitar Equalizer & LCD Tuner 4 Colors Back Light, 4 Band Acoustic Guitar Equalizer Piezo & C-MIC Blender 4 Colors Back Light LCD , 4Band Boutique Guitar Preamp EQ Piezo Pickup W/4 Colors Back Light LCD Tuner , 4Band Guitar Preamp EQ Pickup W/4 Colors Back Light LCD Tuner From Take MIC, 32" ccfl back lights for lcd panel tv, Nikon D5100 SLR REPLACEMENT LCD DISPLAY REPAIR PART WITH BACK LIGHT, Trangle LED Color Glow In Dark LCD Back Light Bedroom Digital Snooze Alarm Clock, NEW CCFL Backlight Lamp w/Diffuser for Samsung LTN154X3 15.4" LCD Screen Light, NEW CCFL Backlight Lamp w/Diffuser for Samsung LTN121XJ 12.1" LCD Screen Light, GENUINE SONY DSC-T200 T300 T500 LCD WITH BACK LIGHT TOUCH SCREEN REPAIR PARTS, 7 LED Color Back Light LCD Digital Calendar Snooze Alarm BEEP Home DeskTop Clock, RUNTKA180WJZZ QKITF0120S2PA BACK LIGHT INVERTER FROM SHARP LC32DA5U LCD TV, CPT 370WA03 KONKA KL37BS22U LCD TV BACK LIGHT INVERTER, RUNTKA181WJZZ QKITF0120S2PB BACK LIGHT INVERTER FROM SHARP LC32DA5U LCD TV, SSB400W16V01 BACK LIGHT INVERTER FROM SAMSUNG LN40A550 LCD TV, LCD Back Light Panel for Canon Powershot A610, Sony VGN-FZ FZ Series LCD Screen Back Light Inverter Board 1-445-192-11, GENUINE SONY DSC-WX9 LCD WITH BACK LIGHT REPAIR PARTS, CPT320WA01C VIT68001.70 Back light Inverter PCB From Philips 32MF231D LCD TV, Porsche 944 951 clock LCD replacement kit NEW w light BLUE BACK LIGHT, 7 LED Color Back Light LCD Digital Calendar Snooze Alarm BEEP Home DeskTop Clock, GENUINE SONY DSC-HX7V LCD WITH BACK LIGHT REPAIR PARTS, WHOLESALE 5 X NEW IPHONE 3GS INNER 6R8 COIL LCD BACK LIGHT FIX PART, GENUINE SAMSUNG W200 LCD WITH BACK LIGHT REPAIR PARTS, CE certification Back light LCD display Infrared Thermometer Temperature Tester, Panasonic Lumix DMC-TZ7 ZS3 LCD back light part, LCD Back Light, GENUINE SONY DSC-H20 LCD WITH BACK LIGHT REPAIR PARTS, SONY S2100 LCD WITH BACK LIGHT REPAIR PARTS, Back Light LCD Display CE Standard Industrial Infrared Thermometer High Accuracy, Hight Accuracy Infrared Thermometer Back light & Digital LCD display CE Approval, Toshiba55G300U LCD TV Back Light Inverter VIT71881.02, Toshiba 55G300U LCD TV Back Light Inverter VIT71881.03, Toshiba 55G300U LCD TV Back Light Inverter VIT71881.00, Toshiba 55G300U LCD TV Back Light Inverter VIT71881.01, GENUINE SONY DSC -W120/130 LCD WITH BACK LIGHT PART/REPAIR, GENUINE SONY DSC -W150-W170 LCD WITH BACK LIGHT PART/REPAIR, Canon SD700 LCD Replacement Repair Part W/ Back Light OEM, LCD BACK LIGHT INVERTER BOARD #120B1-12C, Trangle LED Color Glow In Dark LCD Back Light Bedroom Digital Snooze Alarm Clock, 7 LED Color Back Light LCD Digital Calendar Snooze Alarm BEEP Home DeskTop Clock, GENUINE SONY DSC-F55 LCD WITH BACK LIGHT REPAIR PARTS, FUJIFILM FINEPIX S3280 DIGITAL CAMERA LCD SCREEN DISPLAY W BACKLIGHT BACK LIGHT, LP141WX3 (TL)(B1) LG Philips 14.1 WXGA LCD Screen AS IS CRACKED GOOD BACK LIGHT, GENUINE FUJIFILM S7000 LCD WITH BACK LIGHT REPAIR PARTS , SE Digital Multimeter with Back Light LCD Display, GENUINE OLYMPUS FE 20 LCD WITH BACK LIGHT REPAIR PARTS, GENUINE PANASONIC LS75 LCD WITH BACK LIGHT PART REPAIR,
