User Guide

COMBO memory troubleshooting

Troubleshooting flow

Keyboard troubleshooting

Context

There are two possible failure modes in the keyboard: a) 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), b)

Malfunction of several keys at the same time; this happens when one or more rows or columns are failing

(shortcut or open connection).

For a more detailed description of the keyboard and keymatrix, see section Keyboard. If the failure mode is

not clear, start with the Keyboard Test in Phoenix.

RM-198

Nokia Customer Care BB Troubleshooting and Manual Tuning Guide

Page 6 –12 COMPANY CONFIDENTIAL Issue 1