Black squares on operator panel display
1. Power off and unplug the printer. Remove the paper guide assembly or pedestal top cover.
Disconnect the operator panel cable from the panel and from J110 on the controller board. Check continuity of the cable. Replace the operator panel cable if it fails continuity test. Connect the cable.
2. If the printer has the coax/twinax expansion board, check the adapter connection to the controller board. Make sure the 60-pin expansion adapter is correctly seated in the controller board connector J111 and the coax/twinax expansion board.
3. Make sure the flash memory is seated properly in J10 and J11. Regardless of memory configuration, J11 must be used. Reseat flash memory.
4. Plug in the printer and power it on. If black squares appear on the LCD, the flash memory could be blank. Replace the flash SIMM in J11 with a new flash SIMM and reload code (page 245).
5. Make sure the controller board has a security module installed.
6. Check the shuttle for electrical shorts (page 275).
7. Plug in the printer and power it on. If black squares appear on the LCD, replace the operator panel.
8. Plug in the printer and power it on. If black squares appear on the LCD, replace the controller board (page 365). After replacing the controller board, do NOT make the printer READY, but proceed immediately to the next step.
9. Download and install the latest code from IBM First (page 247).
10. Power on the printer in download mode and load flash memory (page 249).
11. If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support.
Operator panel blank 1. Power off and unplug the printer. Remove the paper guide assembly or pedestal top cover. Check all cable connections into the controller board; make sure the control panel cable is seated in connector J110 on the controller board.
2. If the printer has the coax/twinax expansion board, check the adapter connection to the controller board. Make sure the 60-pin expansion adapter is correctly seated in the controller board and the coax/twinax expansion board.
3. Plug in the printer and power it on. Inspect the operator panel display and cooling fans. If the operator panel is blank and the cooling fans come on, replace the operator panel cable assembly and/or the operator panel, as required.
4. Check the shuttle for electrical shorts (page 275).
5. Plug in the printer and power it on. If the operator panel is blank and the fans do not come on, replace the power supply board.
6. Plug in the printer and power it on. If the operator panel is blank, replace the controller board (page 365). After replacing the controller board, DO NOT make the printer READY, but proceed
immediately to the next step.
7. Download and install the latest code from IBM First (page 247).
8. Power on the printer in download mode and load flash memory (page 249).
9. If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support.
Operator panel display shows garbled, broken characters
1. Power off and unplug the printer.
2. Remove the paper guide assembly or pedestal top cover. Check cable connections into the controller board. Make sure the control panel cable is seated in connector J110 on the controller board.
3. Replace the flash memory.
4. Download the latest code from IBM First (page 247).
5. Power on the printer in download mode and load flash memory (page 249).
6. Power off and unplug the printer. Make sure the DRAM SIMM(s) is/are seated properly in J15/J16.
Reseat DRAM SIMM(s).
7. Power on the printer. If the control panel shows broken characters, replace the DRAM.
8. Power on the printer in download mode and load flash memory (page 249).
9. Do a cable shorts test on the operator panel cable (page 277).
10. If the problem reappears, replace the operator panel and operator panel cable assembly.
11. Power on the printer. If the problem reappears, the controller board or microcode is suspect. Do the following:
12. Save the printer configuration values. (Refer to the Setup Guide.) 13. Clear NVRAM (page 248).
14. Download and install the latest code from IBM First (page 247).
15. Power on the printer in download mode and load flash memory (page 249).
a. If you encounter loading problems, go to the appropriate error code for resolution.
b. If you encounter the failure or message that brought you to this procedure, replace the controller board (page 365). After replacing the controller board, DO NOT make the printer READY, but proceed immediately to the next step.
16. Download and install the latest code from IBM First (page 247).
17. Power on the printer in download mode and load flash memory (page 249).
18. If you encounter the failure after replacing the controller board, reinstall the original controller board and contact your DDS and Second Level Support.
Operator panel keys do not work 1. Power on the printer. Check the operation of the operator panel keys. Replace the operator panel if keys do not work.
2. Power on the printer. Check the operation of the operator panel keys. Replace the operator panel cable assembly if keys do not work.
3. Check the shuttle for electrical shorts (page 275).
4. Power on the printer. Check the operation of the operator panel keys. If the keys do not work, replace the controller board (page 365). Fill out the data sheet provided in the box and return it with the defective board. Do NOT make the printer READY—proceed to the next step.
5. Download the latest code from IBM First (page 247).
6. Power on the printer in download mode and load flash memory (page 249).