Troubleshooting - Samsung MO15E Series Service Manual

4 Troubleshooting

Notes: 1. Before troubleshooting, setup the PC's display as below.
• Resolution: 1024 x 768
• H-frequency: 48 kHz
• V-frequency: 60 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
• No raster appears: SMPS PCB, Main PCB
• 14V develop but no screen: Main PCB
• 14V does not develop: SMPS PCB
4. If you push and hold the "EXIT" button for more than 5 seconds, the monitor automatically turns back
to the factory preset.
4-1 No Power
Does proper DC 14 V appear at
Pin 1, 2 or Pin 3 of CN202?
Yes
Does proper DC 3.3 V appear at
Pin 4 of IC100?
Yes
Check IC101, IC301, IC500 or IC602.
MO15E*
No
Check SMPS.
No
Check IC100.
CONFIDENTIAL
4-1