RM-414; RM-570
BB Troubleshooting and Manual Tuning Guide
User interface troubleshooting
Keypad troubleshooting
Context
If one or more keys are stuck, so that the key does not react when a keydome key is pressed, the failure is
caused by mechanical reasons (dirt, rust, mechanical damage, etc.)
If the failure mode is not clear, start with the Keyboard test in Phoenix.
Troubleshooting flow
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