Service manual

C20

Condential

3-1

Chapter 3

Troubleshooting

Main Procedure

No Symptom

Procedure

No Power

• Ensure the Power Adapter and Outlet or battery are connected

securely

• Ensure all connectors are securely connected and aren’t

broken

• Check keypad board

• Check Main Board

2 Auto Shut Down

• Check the Power Adapter and Outlet or battery

• Check Main Board

3 No Image

• Ensure the Signal Cable and Source work well

• Ensure all connectors are securely connected

• Check Main Board

• Check Engine Module

4 No Light On

• Ensure all connectors are securely connected and aren’t

broken

• Check Engine Module

• Check Main Board

5 Line Bar/Line Defect

• Check if the Main Board and the Engine Module are assem-

bled properly

• Check Main Board

• Check Engine Module

6 Image Flicker

• Do “System reset” in Service mode

• Ensure all the signal cables and source work well

• Check Engine Module

• Check Main Board