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37LH200H (CHASSIS:LD91Y) - LG TV Service Manual (repair manual). Page 54

Read LG 37LH200H (CHASSIS:LD91Y) Service Manual online

Check Signal format
Is it supported?
Check the RGB Cable
YES
MAIN B’D P400 Check
Replace MAIN B’D P400
YES
NO
NO
YES
Check MAIN B’D C208 (Video)
R246 (HSYNC)
R245 (VSYNC)
Replace
MAIN B’D C208 or R246 or R247
NO
Replace MAIN B’D IC 100
YES
MAIN B’D P400 Pin #2
Video signal ?
R437 has Vsync ?
R440 has Hsync ?
Making 
Revision 
2009. 2 . 1
LCD TV
Symptom
RGB No Video Problem
22~42LH200H
Page of 76
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