Lexmark X644E Service Manual - Page 156

7002-xxx 848.00 Error code service check Service scanner-Modem/Config ID mismatch This error indicates that no modem is installed on a modem MFP. FRU 1 Modem Action Install a modem. 848.01 Error code service check Service scanner-Modem/Config ID mismatch. This error indicates that a mode is present on an MFP not configured to support a modem. FRU 1 Modem Action Remove the modem installed in the printer. 900.xx Error code service check FRU 1 Printer POR 2 System board 3 Factory defaults 4 Sub error codes Action Turn the printer off and on several times. If Error Code 900 continues to display, go to step 2. Turn the machine off and on several times, waiting a few minutes between power on and power off. If Error Code 900 continues to display, go to step 3. Restore factory defaults. See "EP Defaults" on page 3-20. This resets the non-critical areas of the user NVRAM. If Error Code 900 continues to display, go to step 4. With Error Code 900 displayed, press and 2. Record the complete list of Sub Error Codes on the display, then call your next level of support or call Lexmark. 900.90 Error code service check Service scanner-This error indicates defective modem hardware. FRU 1 Modem Action Replace the modem. 2-118 Service Manual