Table of Contents
Advertisement
Keyboard troubleshooting
Power button
don´t work
Yes
Power button is loose
or missing
No
Start
Problem
type
Replace
Is keypad flex broken or
button
connector disconnected
End
Check engine connector that
is is properly assembled.
Z4420, R4451 & R4452
Problem in
Baseband
Goto BB
troubleshooting
One or more rocker,
front or top buttons
don´t work
Yes
from flex?
No
OK?
No
Check components
No
OK?
Yes
Change A-frame
assembly
Yes
Change connector
Replace
End
Advertisement
Table of Contents
Troubleshooting
