Troubleshooting - Samsung 400UX-2 Service Manual

4. Troubleshooting

4-1. Troubleshooting
1. Before troubleshooting, setup the PC 's display as below.
• Resolution: 1920 X 1080
• H-frequency: 66 kHz
• V-frequency: 60Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
• No raster appears: Function PCB, Main PCB, I/P PBA
• 55V develop but no screen: Main PBA
• 5V does not develop: SMPS PBA
After soft power turn off, push the mute → 1 → 8 → 2 → power on and so enter the Service Menu.
4.
If you choose the reset, the monitor automatically returns to factory reset.
4. Troubleshooting
4-1