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22LN4600 (CHASSIS:LE33A) - LG TV Service Manual (repair manual). Page 31

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5. TROUBLE SHOOTING – NO PICTURE
P2400 PIN #12
Check backlight 24V
(P2400 #1~#5)
Check STEP-UP DC-DC conv.
IC2406
P102(#27~#30) 12V
IC2408 12V output
IC2408
P102(#15,#16)
8
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