HP Mopier 320 Service Manual - Page 686

Step 2 Display and Communication Does the copy module LCD display indicate Go to Step 3: Error Messages and Problems) ? (YES = Table 7-42. Display and Communication Checks Problem Recommended Action The Fan works, but the display is blank with no backlight. The display is blank with the backlight on. The front panel backlight comes on and display shows the logo, a boot icon, or error message. Re-check power availability. Check the front panel connections and cable. Reseat the ribbon cable into the connector on the front panel. Suspect the front panel or the cable. Check the front panel connections and cable. Inspect and reseat the ribbon cable into the connector on the front panel. Check the connections to and reseat the Power Supply and Main Board Assemblies. Reseat the copy connect EIO card and copy processor card. Check the connections between the copy connect EIO card and the Copy Processor card. Perform an offline test (page 667) to confirm the control PCA is good. Perform a Copy Processor LED test (page 664). If the Copy Processor is okay, suspect the front panel. Replace the suspected part. Perform a Copy Processor LED test (page 664) to confirm that the Copy Processor is okay. If necessary, replace the Copy Processor. Reseat the copy connect EIO card and the copy processor card. Check the connections between the copy connect EIO card and the Copy Processor card. Print a directory of the Mopier's hard disk drive to check that the Copy Module Firmware is installed (see page 592). Make sure displays on the Mopier's control panel during bootup. If it does not, re-download the copy module firmware (see page 107). If the display shows an error message, see page 654 to resolve the problem. If the display stops at one of the four boot icons, note which and see page 666 to resolve the problem. C4229-90911 Display and Communication 653