Figure 16 Touch screen basic checks
Hardware keys troubleshooting
Context
There are two possible failure modes in the keyboard module:
•
One or more keys can be stuck, so that the key does not react when a keydome is pressed. This kind of
failure is caused by mechanical reasons (dirt, rust).
•
Malfunction of several keys at the same time; this happens when one or more rows or columns are failing
(shortcircuit or open connection).
RM-356
BB Troubleshooting and Manual Tuning Guide
Page 3 –30 COMPANY CONFIDENTIAL Issue 1
Copyright © 2008 Nokia. All rights reserved.
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