Konica-Minolta bizhub 25e
Troubleshooting. Machine malfunction. The LCD shows nothing
| What to confirm | Yes | No |
|---|---|---|
| 1. Is the machine in energy save mode? | Press the energy save key, and release the mode. | Check No.2. |
| 2. Is the power cable plugged correctly? | Check No.3. | Plug the cable correctly. |
| 3. Is the power switch On? | Check No.4. | Power on. |
| Does the DC output voltages from the power supply unit to connector P3 on the main control board have the following output? Pin 1, 2, 3, 4 +24V Pin 14 +3.4V Pin 5, 6, 7, 8, 11, 13 GND |
Check No.5. | Replace the power supply. |
| 5. Is the following connection OK? • LCD assembly to the Panel PCB. (P3) • Panel PCB (P1) to the harness to the main control board. (P5A) |
Check No.6. | Reconnect the connection or replace the harness. |
| 6. If you replace the panel board, the symptom will be fixed | Replace the panel board. | Check No.7. |
| 7. If you replace the main control board, the symptom will be fixed. | Replace the main control board. | Replace the machine. |