Part III Appendix
Description of Self-Test Items 251
If the test result is Error, the drive malfunctions.
If the test result is FAIL, brightness control for the main display is abnormal.
Troubleshooting suggestion
a If the test result is Error, restart the equipment and re-perform the self-test. If the problem
persists, recover the equipment.
b If the test result is FAIL, replace the main display. If the problem persists, replace the main
board.
2.26 Z0804 Backlight Control Test for the Main
Display
Upper-level test item
Communication Test Between PC Module and MF FPGA
Test content
The following dialog box appears during the test. The program turns off the backlight for 3 seconds
and then resumes the backlight If you can perceive the changes, click Yes, I Can; otherwise, click
No, I Can't. Click Retry to repeat the preceding procedure.
Test failure analysis
If the test result is Error, the drive malfunctions.
Backlight control of primary LCD monitor goes wrong if the test fails.
Troubleshooting suggestion
a If the test result is Error, restart the equipment and re-perform the self-test. If the problem
persists, recover the equipment.
b If the test result is FAIL, replace the main board.
2.27 Z0805 Secondary Screen Board
Communication Test
Upper-level test item
Communication Monitoring Test
Test content