LG StudioWorks 563N Service Manual page 12

NO CHARACTER
CHECK
IC302
PIN 9 (5V) ?
YES
CHECK
IC302 PIN 5, 6, 7 ?
YES
CHECK
IC302 PIN 18, 19, 20 ?
YES
CHECK
IC303 PIN 4 (80V)
PIN 8 (12V) ?
YES
CHECK
IC303
PIN 1, 2, 3 ?
YES
CHECK
R, G, B CATHODE
VOLTAGE?
YES
TROUBLE IN
CRT SOCKET
2. NO CHARACTER
NO
NO
NO
NO
NO
NO
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TROUBLE IN
P302 5V LINE
TROUBLE IN
PC SIGNAL,
P301 SIGNAL CABLE
TROUBLE IN
IC302
TROUBLE IN
P303 12V LINE/
80V LINE
TROUBLE IN IC303
TROUBLE IN
R331~R333,
L311~L313
D307~D312