Service manual

4 Troubleshooting

4-1

4 Troubleshooting

4-1 No Power (17", 19")

When Pin 4 of CN600 is 0V

does proper DC 13V, 5V

appear at Pin 5 and 6, 7 of

CN600 separately?

Change IP Board.

Check Function Ass'y.

Yes

When Pin 1 of IC600 is DC 5V

does proper DC 3.3V appear at

Pin 3 of IC600?

Check IC600 and related circuit.

Yes

When Pin3 of IC602 is DC 3.3V

does proper DC1.8V appear at

Pin2 of IC602?

Check IC602 and related circuit.

* All locations of this page includes Main PBA.

Notes: 1. Before troubleshooting, setup the PC 's display as below.

• Resolution: 1024 x 768

• H-frequency: 61 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: Function PBA, Main PBA, I/P PBA

• 5V develop but no screen: Main PBA

• 5V does not develop: I/P PBA

4. If you push and hold the " (Enter/Source)" button for more than 5 seconds, the monitor

automatically returns to the factory preset.