User Guide

Figure 36 SleepCLK

Figure 37 SYSCLK

Display module troubleshooting

General instructions for display troubleshooting

The first step is to verify with a working display that the fault is not on the display module itself. The display

module cannot be repaired.

The second step is to check that the cellular engine is working normally. This can be done by connecting the

phone to a docking station and starting Phoenix service software. With the help of Phoenix read the phone

information to check that also the application engine is functioning normally (you should be able to read the

APE ID).

After these checks proceed to the display troubleshooting flowcharts. Use the Display Test tool in Phoenix to

find the detailed fault mode.

Operating modes of the display

The display is in a normal mode when the phone is in active use.

The display is in a partial idle mode when the phone is in the screen saver mode.

The operating modes of the display can be controlled with the help of Phoenix.

RM-170; RM-171

BB Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 6 –9