4-14. Troubleshooting4. Troubleshooting4-1. TroubleshootingBefore troubleshooting, setup the PC ‘s display as below.• Resolution: 1920 X 1080• H-frequency: 66 kHz• V-frequency: 60HzIf no picture appears, make sure the power cord is correctly connected.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 PBAAfter soft power turn off, push the mute → 1 → 8 → 2 → power on and so enter the Service Menu.If you choose the reset, the monitor automatically returns to factory reset.1.2.3.4.