Debugging Flow Chart - Samsung NP-R20 Series Service Manual

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5. Troubleshooting

2) Debugging Flow Chart

S t a r t
P o w e r o n
?
P o w e r o n ?
Y E S
N O
?
L C D d is p la y is O K ?
Y E S
N O
?
K e yb o a r d f u n c t io n is O K ?
Y E S
N O
H D D a n d O D D
?
r e c o g n it io n is O K
in C M O S ?
Y E S
N O
?
O S b o o t in g is O K ?
Y E S
N O
?
T o u c h p a d
f u n c t io n is O K ?
Y E S
N o p r o b le m
?
C h e c k A d a p t e r a n d
C h e c k O n t o p b o a r d &
B a t t e r y.
It is
p r o b le m .
S o lu t io n : R e p la c e t h e d e f e c t e d p a r t o r r e v is e t h e c o n n e c t iv it y..
It is
p r o b le m .
N o p r o b le m
?
C h e c k R A M a n d
r e p la c e it .
N o p r o b le m
C h e c k K e yb o a r d
?
c o n n e c t io n a n d
r e p la c e it .
It is
p r o b le m .
S o lu t io n : R e p la c e t h e d e f e c t e d p a r t o r r e v is e t h e c o n n e c t iv it y..
It is
p r o b le m .
N o p r o b le m
?
C h e c k t h e c o n n e c t io n
a n d c h a n g e t h e u n it .
N o p r o b le m
?
O S is c o r r u p t e d ?
It is
p r o b le m .
S o lu t io n : R e p la c e t h e d e f e c t e d p a r t o r r e v is e t h e c o n n e c t iv it y.
It is
p r o b le m .
N o p r o b le m
?
C h e c k T o u c h p a d
F F C ( M /B )
N o p r o b le m
?
c a b le
It is
p r o b le m .
It is
p r o b le m .
N o p r o b le m
?
C h e c k L C D c a b le .
C h a n g e M a in b o a r d
a n d c h e c k it .
C h a n g e M a in b o a r d
a n d c h e c k it .
It is
p r o b le m .
N o p r o b le m
?
C h e c k T o u c h p a d
F F C ( m o d u le )
5-2
N o p r o b le m
C h e c k t h e r e is a n y
?
C h a n g e M a in b o a r d
s h o r t in t h e m a in
b o a r d .
It is
p r o b le m .
It is
p r o b le m .
It is
p r o b le m .
N o p r o b le m
C h e c k L C D
?
P a n e l a n d
C h e c k N o r t h b r id g e
In v e r t e r
C h a n g e M a in b o a r d
It is
p r o b le m .
It is
p r o b le m .
N o p r o b le m
C h e c k T o u c h p a d ?
In t e r f a c e b o a r d
a n d c h e c k it .
N o p r o b le m
?
a n d c h e c k it .
N o p r o b le m
C h a n g e
?
T o u c h p a d , a n d
c h e c k f u n c t io n .