Toshiba mini NB250 series, Maintenance Manual

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2 Troubleshooting Procedures
NB250/NB255 Series Maintenance Manual
17
2.5 Keyboard Troubleshooting
P e r f o r m e x te r n a l k e y b o a r d c h e c k
( P r o c e d u r e 1 )
S T A R T
D o e s th e e x te r n a l
k e y b o a r d f u n c tio n o k ?
P e r f o r m d ia g n o s tic c h e c k
( P r o c e d u r e 2 )
W a s a k e y b o a r d
p r o b le m d e te c te d ?
P e r f o r m c o n n e c to r a n d
r e p la c e m e n t c h e c k
( P r o c e d u r e 3 )
R e p la c e s y s te m b o a r d
E N D
Y e s
N o
K e y b o a r d is n o t
f a u lty . C o n tin u e
tr o u b le s h o o tin g - r e f e r
to F ig u r e 2 .1
N o
Y e s
Figure 2-4 Keyboard troubleshooting process