Service Manual
Page 22
4-5 Black Screen and backlight turn on Black Screen 4 Troubleshooting Check power supply: Pin1, 2 of CN102 Yes Check pin34, 51, 66, and 82 Of U105 Yes Check pin12, 68, 97 and 117 Of U103 Yes Check Reset (pin19) Of U103 Yes Check Crystal: Pin32, Pin33 Of U103 Yes Check CCFLEnable (pin20) of U103 No MCU Fail No Power Fail No Check FB103 And U102 No Check FB105 And U106 No Check C149, R157 No Check: X1, C147, C148 Yes Check pin5 of Yes CN102 Inverter Fail No Check R127, Q101, R125, R126 4-5
4-5 Black Screen and backlight turn on Black Screen 4 Troubleshooting Check power supply: Pin1, 2 of CN102 Yes Check pin34, 51, 66, and 82 Of U105 Yes Check pin12, 68, 97 and 117 Of U103 Yes Check Reset (pin19) Of U103 Yes Check Crystal: Pin32, Pin33 Of U103 Yes Check CCFLEnable (pin20) of U103 No MCU Fail No Power Fail No Check FB103 And U102 No Check FB105 And U106 No Check C149, R157 No Check: X1, C147, C148 Yes Check pin5 of Yes CN102 Inverter Fail No Check R127, Q101, R125, R126 4-5
Service Manual
Page 23
No Check Panel Enable Of U103 (pin75) is High? Yes No Check R134, R176, Q102, Q105 Check LVDS Yes Signals No Check the HW No Reset Of U103 pin19 Yes Check the pins Of U103 Panel Fail Check C149 R157 END 4-6 4 Troubleshooting 4-6 White Screen White Screen LVDS Cable Yes Reinsert No Workmanship Change LVDS Yes Cable LVDS Cable NG No Check VLCD Is 5V?
No Check Panel Enable Of U103 (pin75) is High? Yes No Check R134, R176, Q102, Q105 Check LVDS Yes Signals No Check the HW No Reset Of U103 pin19 Yes Check the pins Of U103 Panel Fail Check C149 R157 END 4-6 4 Troubleshooting 4-6 White Screen White Screen LVDS Cable Yes Reinsert No Workmanship Change LVDS Yes Cable LVDS Cable NG No Check VLCD Is 5V?
Service Manual
Page 24
4-8 Bad Screen Bad Screen LVDS Cable Yes Reinsert No Change LVDS Yes Cable No Check Yes Crystal:Pin32, Pin33 of U103 Yes Check the No communication Of U103 and U104 Yes Check the pins of U103 and U104 4 Troubleshooting Workmanship LVDS Cable NG Check :X1, C147, C148 Check: SDO, SCZ, SCK, SDI, Reset 4-7
4-8 Bad Screen Bad Screen LVDS Cable Yes Reinsert No Change LVDS Yes Cable No Check Yes Crystal:Pin32, Pin33 of U103 Yes Check the No communication Of U103 and U104 Yes Check the pins of U103 and U104 4 Troubleshooting Workmanship LVDS Cable NG Check :X1, C147, C148 Check: SDO, SCZ, SCK, SDI, Reset 4-7
User Guide
Page 26
... -screen menus to change the contrast according to personal preference. Picture Color Image OSD Setup Information Brightness Color Tone Coarse Language Image Reset Contrast Color Control Fine H-Position Color Reset Gamma Sharpness V-Position H-Position V-Position Transparency Display Time Picture Menu Brightness Contrast Description You can use the on -screen menus to change...
... -screen menus to change the contrast according to personal preference. Picture Color Image OSD Setup Information Brightness Color Tone Coarse Language Image Reset Contrast Color Control Fine H-Position Color Reset Gamma Sharpness V-Position H-Position V-Position Transparency Display Time Picture Menu Brightness Contrast Description You can use the on -screen menus to change...