• Code: 241.11, 241.91
• Description: 241.11 The paper remains detected at the sensor (tray 1 feed) after the printer is turned on. 241.91 The paper remains detected at the sensor (tray 1 feed) after the printer is turned on.
• Remedy: Step 1 Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Go to step 2. Go to step 7. Step 2 Make sure that the tray 1 feed paper path, including the sensors, are free of debris or dust. Does the problem remain? Go to step 3. The problem is solved. Step 3 Check the sensor (tray 1 paper feed). Is it free of damage? Go to step 4. Go to step 6. Step 4 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > PRINTER SENSOR TESTS > Tray 1 paper feed Does the sensor status change while toggling the sensor? Go to step 7. Go to step 5. Step 5 a Reseat the tray 1 paper feed sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 Replace the sensor (tray 1 paper feed). Does the problem remain? Go to step 7. The problem is solved. Step 7 Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 1 Does the leading edge of the paper reach the sensor (tray 1 paper feed)? Go to step 14. Go to step 8. Step 8 Check the tray 1 feed, pick, and separator rollers for damage, and replace if necessary. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Go to step 9. The problem is solved. Step 9 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > PRINTER MOTOR TESTS > Paper feed Does the motor run? Go to step 13. Go to step 10. Step 10 a Reseat the feed motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 11. The problem is solved. Step 11 a Check the paper feed belt for proper tension, and adjust if necessary. b Check the paper feed gear and belt for wear or damage, and replace if necessary. Does the problem remain? Go to step 12. The problem is solved. Step 12 Replace the motor (feed). See “Motor (feed) removal”. Does the problem remain? Go to step 13. The problem is solved. Step 13 a Check the tray 1 paper feed clutch for damage, and replace if necessary. b Reseat the clutch cable. Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 14. The problem is solved. Step 14 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > PRINTER MOTOR TESTS > Registration Does the motor run? Go to step 18. Go to step 15. Step 15 a Reseat the registration motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 16. The problem is solved.

• Code: 242.21...242.91
• Description: 242.21 The paper remains detected at the sensor (tray 2 feed) after the printer is turned on. 242.26 The sensor (tray 2 transport) did not detect the paper. 242.91 The paper remains detected at the sensor (tray 2 transport) after the printer is turned on.
• Remedy: Step 1 Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Go to step 2. Go to step 7. Step 2 Make sure that the tray 2 feed paper path, including the sensors, are free of debris or dust. Does the problem remain? Go to step 3. The problem is solved. Step 3 Check the sensor (tray 2 paper feed). Is it free of damage? Go to step 4. Go to step 6. Step 4 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > PRINTER SENSOR TESTS > Tray 2 paper feed Does the sensor status change while toggling the sensor? Go to step 7. Go to step 5. Step 5 a Reseat the tray 2 paper feed sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 Replace the sensor (tray 2 paper feed). Does the problem remain? Go to step 7. The problem is solved. Step 7 Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 2 Does the leading edge of the paper reach the sensor (tray 2 paper feed)? Go to step 8. Go to step 9. Step 8 Does the leading edge of the paper reach the sensor (tray 2 transport)? Go to step 15. Go to step 10. Step 9 Check the tray 2 feed, pick, and separator rollers for damage, and replace if necessary. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Go to step 10. The problem is solved. Step 10 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > PRINTER MOTOR TESTS > Paper feed Does the motor run? Go to step 14. Go to step 11. Step 11 a Reseat the feed motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 12. The problem is solved. Step 12 a Check the paper feed belt for proper tension, and adjust if necessary. b Check the paper feed gear and belt for wear or damage, and replace if necessary. Does the problem remain? Go to step 13. The problem is solved. Step 13 Replace the motor (feed). See “Motor (feed) removal”. Does the problem remain? Go to step 14. The problem is solved. Step 14 a Make sure that the paper feed drive assembly is properly installed. b Make sure that the assembly is clear of obstructions. c Check the assembly for damage, and replace if necessary. See “Feed drive assembly removal”. Does the problem remain? Go to step 15. The problem is solved. Step 15 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > PRINTER MOTOR TESTS > Tray 2 vertical transport Does the motor run? Go to step 19 Go to step 16. Step 16 a Reseat the tray 2 transport motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 17. The problem is solved Step 17 a Check the transport drive belt for proper tension, and adjust if necessary. b Check the transport drive assembly for wear or damage, and replace if necessary. Does the problem remain? Go to step 18. The problem is solved. Step 18 Replace the motor (tray 2 transport). Does the problem remain? Go to step 19. The problem is solved. Step 19 Check the tray 2 transport roller for damage, and replace if necessary. Does the problem remain? Go to step 20. The problem is solved. Step 20 a Make sure that the tray transport guide is properly installed. b Make sure that the guide is clear of obstructions. c Check the guide for damage, and replace if necessary. Does the problem remain? Go to step 21. The problem is solved. Step 21 a Make sure that the paper feed unit is properly installed. b Make sure that the unit is clear of obstructions. c Check the unit for damage, and replace if necessary. Does the problem remain? Go to step 22. The problem is solved. Step 22 Make sure that the blue screws and marked screws in the paper path area are tightened. Does the problem remain? Go to step 23. The problem is solved. Step 23 Check the expansion controller board pins for damage, and replace if necessary. See “Expansion controller board removal”. Does the problem remain? Go to step 24. The problem is solved. Step 24 Check the engine controller board pins for damage, and replace if necessary. See “Engine controller board removal”. Does the problem remain? Contact the next level of support. The problem is solved.

• Code: 242.93
• Description: The sensor (tray 2 transport) did not detect the paper from tray 3.
• Remedy: Step 1 Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Go to step 2. Go to step 7. Step 2 Make sure that the tray 3 feed paper path, including the sensors, are free of debris or dust. Does the problem remain? Go to step 3. The problem is solved. Step 3 Check the sensor (2 x 500.sheet tray 3 feed). Is it free of damage? Go to step 4. Go to step 6. Step 4 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 3 feed Does the sensor status change while toggling the sensor? Go to step 13. Go to step 5. Step 5 a Reseat the sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 Replace the sensor (2 x 500.sheet tray 3 feed). See g2 x 500-sheet tray transport assembly sensors removalh. Does the problem remain? Go to step 7. The problem is solved. Step 7 Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 3 Does the leading edge of the paper reach the sensor (2 x 500.sheet tray 3 paper feed)? Go to step 13. Go to step 8. Step 8 Check the tray 3 feed, pick, and separator rollers for damage, and replace if necessary. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Go to step 9. The problem is solved Step 9 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > 2 x 500-Sheet Tray Motor Tests > Tray 3 feed Does the motor run? Go to step 17. Go to step 10. Step 10 a Reseat the motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 11. The problem is solved. Step 11 a Check the paper feed belt for proper tension, and adjust if necessary. b Check the paper feed gear and belt for wear or damage, and replace if necessary. Does the problem remain? Go to step 12. The problem is solved. Step 12 Replace the motor (2 x 500.sheet tray 3 transport). See g2 x 500-sheet tray feed and transport motors removalh. Does the problem remain? Go to step 13. The problem is solved. Step 13 Check the sensor (2 x 500.sheet tray 3 transport). Is it free of damage? Go to step 14. Go to step 16. Step 14 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 3 transport Does the sensor status change while toggling the sensor? Go to step 17. Go to step 15. Step 15 a Reseat the sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 16. The problem is solved. Step 16 Replace the sensor (2 x 500.sheet tray 3 transport). See g2 x 500-sheet tray transport assembly sensors removalh. Does the problem remain? Go to step 17. The problem is solved Step 17 Check the 2 x 500.sheet tray controller board pins for damage, and replace if necessary. See g2 x 500-sheet tray controller board removalh. Does the problem remain? Contact the next level of support. The problem is solved.

• Code: 242.93
• Description: The sensor (tray 2 transport) did not detect the paper from the 3000.sheet tray.
• Remedy: Step 1 a Make sure that the tray is free of debris. b Make sure that the tray is properly installed and aligned to the printer. c Reseat the interface cable that is plugged into the 2500. or 2 x 500.sheet tray. d Reset the printer. Does the problem remain? Go to step 2. The problem is solved. Step 2 a Remove the rear cover. b Make sure that the sensor (3000-sheet tray set) is properly installed. c Make sure that the sensor is free of debris or dust. d Reseat the cable on the sensor and the cable CN5 on the controller board. e Check the sensor for damage. Is it free of damage? Go to step 3. Go to step 4. Step 3 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 3000.Sheet Tray Sensor Tests > Tray set Does the sensor status change while toggling the sensor? Go to step 5. Go to step 4. Step 4 Replace the sensor. See gSensor (3000-sheet tray set) removalh. Does the problem remain? Go to step 5. The problem is solved. Step 5 a Reseat the cable on the rest of the sensors. b Reseat the cable CN5 on the controller board. c If necessary, reseat all the junction connectors on the cables. d Make sure that the cables do not block the path of moving parts. e Check the cables for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 a Reseat the cable on all of the motors and on the top door switch. b Reseat the cables CN3 and CN4 on the controller board. c If necessary, reseat all the junction connectors on the cables. d Make sure that the cables do not block the path of moving parts. e Check the cables for damage, and replace if necessary. Does the problem remain? Contact the next level of support. The problem is solved.

• Code: 243.31, 243.36, 243.91
• Description: 243.31 2 x 500.sheet tray: The paper remains detected at the sensor (tray 3 feed) after the printer is turned on. 243.36 2 x 500.sheet tray: The sensor (tray 3 transport) did not detect the paper. 243.91 2 x 500.sheet tray: The paper remains detected at the sensor (tray 3 transport) after the printer is turned on.
• Remedy: Step 1 Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Go to step 2. Go to step 7. Step 2 Make sure that the tray 3 feed paper path, including the sensors, are free of debris or dust. Does the problem remain? Go to step 3. The problem is solved. Step 3 Check the sensor (2 x 500.sheet tray 3 feed). Is it free of damage? Go to step 4. Go to step 6. Step 4 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 3 feed Does the sensor status change while toggling the sensor? Go to step 13. Go to step 5. Step 5 a Reseat the sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 Replace the sensor (2 x 500.sheet tray 3 feed). See g2 x 500-sheet tray transport assembly sensors removalh. Does the problem remain? Go to step 7. The problem is solved. Step 7 Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 3 Does the leading edge of the paper reach the sensor (2 x 500.sheet tray 3 paper feed)? Go to step 13. Go to step 8. Step 8 Check the tray 3 feed, pick, and separator rollers for damage, and replace if necessary. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Go to step 9. The problem is solved. Step 9 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > 2 x 500-Sheet Tray Motor Tests > Tray 3 feed Does the motor run? Go to step 17. Go to step 10. Step 10 a Reseat the motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 11. The problem is solved. Step 11 a Check the paper feed belt for proper tension, and adjust if necessary. b Check the paper feed gear and belt for wear or damage, and replace if necessary. Does the problem remain? Go to step 12. The problem is solved. Step 12 Replace the motor (2 x 500.sheet tray 3 transport). See g2 x 500-sheet tray feed and transport motors removalh. Does the problem remain? Go to step 13. The problem is solved. Step 13 Check the sensor (2 x 500.sheet tray 3 transport). Is it free of damage? Go to step 14. Go to step 16. Step 14 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 3 transport Does the sensor status change while toggling the sensor? Go to step 17. Go to step 15. Step 15 a Reseat the sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 16. The problem is solved. Step 16 Replace the sensor (2 x 500.sheet tray 3 transport). See g2 x 500-sheet tray transport assembly sensors removalh. Does the problem remain? Go to step 17. The problem is solved. Step 17 Check the 2 x 500.sheet tray controller board pins for damage, and replace if necessary. See g2 x 500-sheet tray controller board removalh. Does the problem remain? Contact the next level of support. The problem is solved.

• Code: 243.31, 243.43, 243.91
• Description: 243.31 2500.sheet tray: The paper remains detected at the sensor (tray 3 feed) after the printer is turned on. 243.43 2500.sheet tray: The paper remains detected at the sensor (tray 3 transport) during a print job. 243.91 2500.sheet tray: The paper remains detected at the sensor (tray 3 transport) after the printer is turned on.
• Remedy: Step 1 a Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log b Check the last digits of the error codes. Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Go to step 2. Go to step 7. Step 2 Make sure that the 2500-sheet tray feed paper path, including the sensors, are free of debris or dust. Does the problem remain? Go to step 3. The problem is solved. Step 3 Check the sensor (2500-sheet tray feed) for damage. Is it free of damage? Go to step 4. Go to step 6. Step 4 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2500-Sheet Tray Sensor Tests Does the sensor status change while toggling the sensor? Go to step 13. Go to step 5. Step 5 a Reseat the 2500-sheet tray feed sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 Replace the sensor (2500-sheet tray feed). See gSensor (2500.sheet tray feed) removalh. Does the problem remain? Go to step 7. The problem is solved. Step 7 a Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 3 b Observe the movement and position of the paper. Does the leading edge of the paper reach the sensor (2500-sheet tray feed)? Go to step 13. Go to step 8. Step 8 Check the 2500.sheet tray feed, pick, and separator rollers for wear or damage, and replace if necessary. See g2500-sheet tray paper feed assembly removalh and g2500-sheet tray pick assembly removalh. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Go to step 9. The problem is solved. Step 9 a Make sure that the motor (2500-sheet tray feed) is properly installed. b Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > 2500-Sheet Tray Motor Tests > Tray feed Does the motor run? Go to step 17. Go to step 10. Step 10 a Reseat the 2500-sheet tray feed and transport motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 11. The problem is solved. Step 11 a Check the 2500-sheet tray feed and transport motor belt for proper tension, and adjust if necessary. b Check the 2500-sheet tray feed and transport motor belt and gears for wear or damage, and replace if necessary. Does the problem remain? Go to step 12. The problem is solved. Step 12 Replace the motor (2500-sheet tray feed). See gMotor (2500.sheet tray feed) removalh. Does the problem remain? Go to step 13. The problem is solved. Step 13 Check the sensor (2500-sheet tray transport) for damage. Is it free of damage? Go to step 14. Go to step 16. Step 14 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2500-Sheet Tray Sensor Tests Does the sensor status change while toggling the sensor? Go to step 17. Go to step 15. Step 15 a Reseat the 2500-sheet tray transport sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 16. The problem is solved. Step 16 Replace the sensor (2500-sheet tray transport). See gSensor (2500.sheet tray transport) removalh. Does the problem remain? Go to step 17. The problem is solved. Step 17 Check the 2500-sheet tray controller board pins for damage, and replace if necessary. See g2500-sheet tray controller board removalh. Does the problem remain? Contact the next level of support. The problem is solved.

• Code: 244.41, 244.46, 244.91, 245.56
• Description: 244.41 The paper remains detected at the sensor (tray 4 feed) after the printer is turned on 244.46 The sensor (tray 4 transport) did not detect the paper. 244.91 The paper remains detected at the sensor (tray 4 transport) after the printer is turned on. 245.56 The sensor (3000-sheet tray feed) did not detect the paper.
• Remedy: Step 1 Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Go to step 2. Go to step 7. Step 2 Make sure that the tray 4 feed paper path, including the sensors, are free of debris or dust. Does the problem remain? Go to step 3. The problem is solved. Step 3 Check the sensor (2 x 500.sheet tray 4 feed). Is it free of damage? Go to step 4. Go to step 6. Step 4 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 4 feed Does the sensor status change while toggling the sensor? Go to step 13. Go to step 5. Step 5 a Reseat the sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 6. The problem is solved. Step 6 Replace the sensor (2 x 500.sheet tray 4 feed). See g2 x 500-sheet tray transport assembly sensors removalh. Does the problem remain? Go to step 7. The problem is solved. Step 7 Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 4 Does the leading edge of the paper reach the sensor (2 x 500.sheet tray 4 paper feed)? Go to step 13. Go to step 8. Step 8 Check the tray 4 feed, pick, and separator rollers for damage, and replace if necessary. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Go to step 9. The problem is solved. Step 9 Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > 2 x 500-Sheet Tray Motor Tests > Tray 4 feed Does the motor run? Go to step 17. Go to step 10. Step 10 a Reseat the motor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 11. The problem is solved. Step 11 a Check the paper feed belt for proper tension, and adjust if necessary. b Check the paper feed gear and belt for wear or damage, and replace if necessary. Does the problem remain? Go to step 12. The problem is solved. Step 12 Replace the motor (2 x 500.sheet tray 4 transport). See g2 x 500-sheet tray feed and transport motors removalh. Does the problem remain? Go to step 13. The problem is solved. Step 13 Check the sensor (2 x 500.sheet tray 4 transport). Is it free of damage? Go to step 14. Go to step 16. Step 14 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 4 transport Does the sensor status change while toggling the sensor? Go to step 17. Go to step 15. Step 15 a Reseat the sensor cable. b Check the cable for damage, and replace if necessary. Does the problem remain? Go to step 16. The problem is solved. Step 16 Replace the sensor (2 x 500.sheet tray 4 transport). See g2 x 500-sheet tray transport assembly sensors removalh. Does the problem remain? Go to step 17. The problem is solved. Step 17 Check the 2 x 500.sheet tray controller board pins for damage, and replace if necessary. See g2 x 500-sheet tray controller board removalh. Does the problem remain? Contact the next level of support. The problem is solved.

• Code: 244.91, 245.91
• Description: 244.91 The sensor (3000-sheet tray feed) did not detect the paper. 245.91 The paper remains detected at the sensor (3000.sheet tray transport) after the printer is turned on.
• Remedy: Step 1 a Open the top door. b Make sure that the tray is free of debris. c Make sure that the tray is properly installed and aligned to the printer. d Reseat the interface cable that is plugged into the 2500. or 2 x 500.sheet tray. e Reset the printer. Does the problem remain? Go to step 2. The problem is solved. Step 2 a Make sure that the feed, separator, and pick rollers are properly installed. b Make sure that the rollers are free of debris or dust. c Check the rollers for wear or damage, and replace if necessary. Does the problem remain? Go to step 3. The problem is solved. Step 3 a Remove the left top cover. b Make sure that the transport roller is properly installed. c Make sure that the roller is free of debris or dust. d Check the roller for wear or damage, and replace if necessary. See g3000-sheet tray feed roller assembly removalh. Does the problem remain? Go to step 4. The problem is solved. Step 4 a Make sure that the following sensors are properly installed: . Sensor (3000-sheet tray elevator level) . Sensor (3000-sheet tray empty) . Sensor (3000-sheet tray feed) b Make sure that the sensors are free of debris or dust. c Reseat the cable on the sensors and the cable CN5 on the controller board. d Check the sensors for damage. Are they free of damage? Go to step 5. Go to step 6. Step 5 Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 3000.Sheet Tray Sensor Tests > Tray upper limit or Tray paper feed Does the sensor status change while toggling the sensor? Go to step 7. Go to step 6. Step 6 Replace the sensor. See gSensor (3000-sheet tray elevator level) removalh or gSensor (3000-sheet tray feed) removalh. Does the problem remain? Go to step 7. The problem is solved. Step 7 Test the motor (3000-sheet tray feed) and motor (3000-sheet tray transport). Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > 3000-Sheet Tray Motor Tests > Tray feed or Tray transport Do the motors run? Go to step 9. Go to step 8. Step 8 a Reseat the cable on the motor and the cable CN4 on the controller board. b Check the motors and cables for damage, and replace if necessary. See g3000-sheet tray feed and transport motors removalh. Does the problem remain? Go to step 9. The problem is solved. Step 9 Check the belts and gears connected to the motors for wear or damage, and replace if necessary. Does the problem remain? Go to step 10. The problem is solved. Step 10 a Reseat the cable on the rest of the sensors. b Reseat the cable CN5 on the controller board. c If necessary, reseat all the junction connectors on the cables. d Make sure that the cables do not block the path of moving parts. e Check the cables for damage, and replace if necessary. Does the problem remain? Go to step 11. The problem is solved. Step 11 a Reseat the cable on the rest of the motors and on the top door switch. b Reseat the cables CN3 and CN4 on the controller board. c If necessary, reseat all the junction connectors on the cables. d Make sure that the cables do not block the path of moving parts. e Check the cables for damage, and replace if necessary. Does the problem remain? Contact the next level of support. The problem is solved.