Display Module Troubleshooting; General Instructions For Display Troubleshooting - Nokia 6233 Service Manual

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• One or more keys are stuck, so that the key does not react when a keydome or a side key is pressed. This
kind 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 key
matrix are failing (shortcut or open connection).
If the failure mode is not clear, start with the Keyboard test in Phoenix.
Troubleshooting flow

Display module troubleshooting

General instructions for display troubleshooting

Context
• 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 of
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BB Troubleshooting and Manual Tuning Guide
Phoenix .
RM-123; RM-145
Issue 1