Display Module Troubleshooting; General Instructions For Display Troubleshooting; Table 1 Display Module Troubleshooting Cases - Nokia N70 Manual

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BB Troubleshooting and Manual Tuning Guide
vii To write the file to phone, click Start.
Next action
After a successful rewrite, you must retune the phone completely by using Phoenix tuning functions.
Note: CARRY OUT ALL TUNINGS (BASEBAND, RF, UI)!

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 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
Display is in a normal mode when the phone is in active use.
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.
Display blank
Image on the display not correct
Issue 1

Table 1 Display module troubleshooting cases

Company Confidential
Copyright ©2005 Nokia. All Rights Reserved.
There is no image on the display. Display looks the
same when the phone is on as it does when the
phone is off. The backlight can be on in some cases.
Image on the display can be corrupted or part of the
image can be missing. If part of image is missing
change the display module. If the image is otherwise
corrupted, follow the appropriate troubleshooting
diagram.
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