Nokia RM-645 Service Manual page 72

Steps
1. Verify with a working display that the fault is not on the display module itself.
The display module cannot be repaired.
2. Check that the cellular engine is working normally.
i To check the functionality, connect the phone to a docking station.
Phoenix service software.
ii Start
iii Read the phone information to check that also the application engine is functioning normally (you
should be able to read the APE ID).
3. Proceed to the display fault troubleshooting flowchart.
Use the Display Test tool in
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Phoenix to find the detailed fault mode.
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BB Troubleshooting and Manual Tuning Guide
RM-645
Issue 1