Step 1  Remove the controller board shield. See Controller board shield removal. Check the cables on the controller board for proper connection.
Are the cables properly connected? | Go to step 2. | Go to step 3. |
Step 2 Replace the controller board. See Controller board removal. Does the problem remain? | Go to step 4. | The problem is solved. |
Step 3 Reconnect the cables on the controller board. Does the problem remain? | Go to step 4. | The problem is solved. |
Step 4 Remove all supplies, and then reset the printer. Does the problem remain? | Go to step 5. | Go to step 6. |
Step 5 Replace the imaging unit. Does the problem remain? | Contact the next level of support. | The problem is solved. |
Step 6 Check if a 31.xx error appears? Did a 31.xx error appear? | Go to step 7. | The problem is solved. |
Step 7 Replace the supplies. Does the problem remain? | Go to step 8. | The problem is solved. |
Step 8 Check the continuity of the supplies and imaging unit cables. Do the cables have continuity? | Contact the next level of support. | Go to step 9. |
Step 9 Replace the defective cable. Does the problem remain? | Contact the next level of support. | The problem is solved. |