General Troubleshooting - Nokia 920C Service Manual

5-2 General Troubleshooting

5-2-1 No Picture
LED blinks?
No
LED is green color?
Yes
Check G2 voltage, high voltage,
R, G, B cathode voltage.
5-2-2 Shut Down
Blinking LED's?
Yes
Scan failure
No
High voltage failure?
No
Video failure?
No
Check and replace IC201.
Done
720C/920C
Yes
5-2-2 Shut down
No
LED is Amber color?
After restart monitor LED doesn't
come on, repair power circuit.
No
Check power supply.
Check horizontal, vertical deflection
Yes
system and check power supply
secondary voltages.
Yes
Check high voltage system.
Yes
Check Video board.
Yes
No
5 Troubleshooting
Check signal cable.
5-13