LG FLATRON F700B - OSD FUNCTION PROBLEMS

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7. TROUBLE IN OSD
TROUBLE IN
OSD PERIPHERAL
CIRCUIT
NO OSD
TROUBLE IN
5V LINE
TROUBLE IN
IC401 PIN 29 (V-FBP),
IC701 PIN 1LINE (H-FBP)
NO
YES
DC 5V
YES
NO
Pin 24
5V
Pin 1
CHECK
IC302 B
+
(5V)
?
(ENTER BUTTON MUST BE PRESSED.)
CHECK
IC302 PIN 1, 24
WAVEFORM?