Dell 2005FPW - UltraSharp - 20.1" LCD Monitor - Troubleshooting Guide; DPM Troubleshooting

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4. TROUBLE IN DPM
TROUBLE IN DPM
NO
NO
TROUBLE IN PC
CHECK PC
PC IS NOT GOING
INTO DPM OFF MODE
TROUBLE IN SIGNAL CABLE
YES
YES
CHECK
R135, R137(SYNC) ?
CHECK
R144(SIGNAL DETECT)
?
109
9
Waveforms
R135,R137-V-SYNC
10
R135,R137-H-SYNC