Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | UI broad defective. | Replace the UI board UIA251. <Video Link> | UI board (004-3410-9-SP) |
| 2 | Main broad defective. | Replace the Main board MBA869. <Video Link> | Main board AD3100 (004-3400A-9-SP) AD3100N (004-3400B-9-SP) AD3100WN (004-3400C-9-SP) |
