SOURCE: lg 42lg50 LCD tv has audio but no picture
The backlight is out most likely caused by either the T conn or the Invertor. The invertor is most likely you can get replacement boards from www.tvcircuitboards.com leave a email if your not sure what you need.
INVERTER BOARD NUMBERS REPAIR KIT NUMBER
Master - 6632L-0470A PNEL-T707A KIT63
Slave - 6632L-0471A PNEL-T708A KIT63
As used on the LG / PHILIPS LCD PANEL TYPE: LC420WU5
Examples of models that use this panel:
• PHILIPS 42PFL7662
• PHILIPS 42PFL9900D10
• PHILIPS 42PFL5332D
• PHILIPS 42PFL7332D37
• PHILIPS42MF337B/37
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