Troubleshooting - Samsung EX2220 Service Manual

4. Troubleshooting

4-1. Troubleshooting
1. Set custom mode as follows before beginning a repair.
EX2220 / EX2220X
Resolution: 1920 x 1080
H-freq uency: 67 kHz
V-frequency: 60 Hz
2. If the screen is blank, check whether the power cord is connected correctly.
3. The circuits to check:
• When the raster does not appear: The Function PCB, Main PCB, I/P PBA
• When 5V is generated but a blank screen is displayed: Main PCB
• When 5V is not generated: I/P PBA
4. "Press the MENU button and hold down the, "
factory mode.
(Enter, Source)" button for more than five (5) seconds to return the monitor to
4. Troubleshooting
4-1