• One or more keys are stuck, so that the key does not react when a keydome or a side key is pressed. Thiskind of failure is caused by mechanical reasons (dirt, rust, mechanical damage, etc.)• Malfunction of several keys at the same time; this happens when one or more rows or columns in the keymatrix are failing (shortcut or open connection).If the failure mode is not clear, start with the Keyboard test in Phoenix.Troubleshooting flowDisplay module troubleshootingGeneral instructions for display troubleshootingContext• The 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 ofPhoenix.RM-123; RM-145Nokia Customer Care BB Troubleshooting and Manual Tuning GuidePage 6 –22 COMPANY CONFIDENTIAL Issue 1Copyright © 2006 Nokia. All rights reserved.
