Troubleshooting - Samsung GH17LS Service Manual

5 Troubleshooting

Notes: 1. Before troubleshooting, setup the PC's display as below.
• Resolution: 1280 x 1024
• H-frequency: 64 kHz
• V-frequency: 60 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. If you push and hold the EXIT button for more than 5 seconds, the monitor automatically turns back
to the factory preset.
5-1-1 No Power
When Pin 6 of CN105 is 0V
does proper DC 12V, 5V
appear at Pin 1, 2 and 7 of
CN105 seperately?
Yes
Does proper DC 5 V appear at
Pin 3 of IC115?
Yes
Does proper DC 3.3 V appear at
Pin 3 of IC112?
Yes
Does proper DC 2.5 V appear at
Pin 2 of IC116 and IC117?
❇ 0V means power on state.
GH17LS/GH17ES
❇
No
No
Check IC115 and related circuit.
No
Check IC112 and related circuit.
No
Change power Adaptor.
Check IC116, IC117
and related circuit.
5-1