Keyboard Troubleshooting - Nokia 2608 Service Manual

RM-376
Baseband Troubleshooting

Keyboard troubleshooting

Context
There are two possible failure modes in the keyboard module:
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)
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 L3 PST.
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