Editing Apple Lisa Troubleshooting (section)

== Keyboard Problems ==

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+ '''Keyboard Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| No keys working || Keyboard cable disconnected || Check cable connection to I/O board
|-
| Most keys not working || Deteriorated foam pads || Replace capacitive foam and foil pads
|-
| Some keys work, others don't || Individual pad failure || Replace foam/foil on affected keys
|-
| Keyboard error on boot || Keyboard not detected || Check cable; verify keyboard controller chip
|}

=== Foam Pad Replacement ===
The Lisa keyboard uses capacitive foam pads that deteriorate with age:
* Purchase Lisa keyboard foam/foil replacement kit
* Each key requires a new foam pad and conductive foil
* This is the most common Lisa keyboard repair