GH17P*/GH18P* 4-1
4-1 Troubleshooting (GH17P*)
Notes: 1. Before troubleshooting, setup the PC’s display as below.
• Resolution: 1280 x 1024
• H-frequency: 63 kHz
• V-frequency: 75 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
• No raster appears: Stand PCB, Main PCB
• 12V develop but no screen: Main PCB
• 12V does not develop: Main PCB
4. If you push and hold the Minus(–) button for more than 5 seconds, the monitor automatically turns back
to the factory preset.
4-1-1 No Power
Does proper DC 14V appear at
DC jack and Pin 1, 2 of CN505 ?
Check signal cable
and power apaptor.
Yes
No
Does proper DC 5V, DC 3.3V
appear at Pin 3 of IC101,
IC529 and Pin IC102?
Check IC101, IC529, IC102
and related circuit.
Yes
No
Does proper DC 3.3V,
DC 2.5V appear at Pin 2 of
IC510 and Pin 3 of IC104?
Check IC510, IC104,
and related circuit.
Check IC503.
Yes
No
Yes
Does proper 3.3V and 5.0V -Signal
appear at Pin 32 of IC401 and Pin 41 of
IC521? (Panel-pwron, Lvds-pwron)
Check IC401, IC521
and related circuit.
No
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