User interface troubleshootingKeypad troubleshootingContextThere are two possible failure modes in the keyboard module:• One or more keys are stuck, so that the key does not react when a keydome is pressed. This kind of failureis 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.RM-495; RM-496BB Troubleshooting and Manual Tuning GuidePage 3 –18 COMPANY CONFIDENTIAL Issue 1Copyright © 2008 Nokia. All rights reserved.
