LG Flatron E701S Service Manual page 19

NO OSD
CHECK
IC301 B +
(5V) ?
DC 5V
YES
CHECK
IC301 PIN 5, 10
WAVEFORM?
Pin 10
5V
YES
Pin 5
CHECK
IC301 PIN 12
WAVEFORM ?
H+V
5V
YES
CHECK
IC301 PIN 13, 14, 15 ?
H+V
5V
YES
TROUBLE IN
OSD PERIPHERAL
CIRCUIT
7. TROUBLE IN OSD
(ENTER BUTTON MUST BE PRESSED.)
NO
NO
NO
NO
TROUBLE IN
5V LINE
TROUBLE IN
IC601 PIN1 (V-FBP),
T701 40V LINE (H-FBP)
TROUBLE IN
IC302, IC301
TROUBLE IN
IC301, IC302