LG Flatron L1972H - DPM Troubleshooting; Trouble in DPM Diagnosis

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2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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4. TROUBLE IN DPM
TROUBLE IN DPM
TROUBLE IN IC501
CHECK PC
PC IS GOING
INTO DPM MODE
NO
CHECK H/V SYNC LINE
NO
YES
CHECK R718 AND
R719, SYNC
APPEARED?
CHECK
IC501 PIN 32,33
SYNC PULSE
YES
1
H-SYNC
2
V-SYNC
Waveforms
1
2