H a n n S t a r D i s p l a y C o r p .
Document Title
HW191A _XY _HSM
Page No.
40
40 /
72
Document No.
Revision
07/08/03
The information contained in this document is the exclusive property of HannStar Display Corporation. It shall not be
disclosed,distributed or reproduced in whole or in part without written permission of HannStar Display Corporation.
No picture (LED orange)
No picture
The button if under
control
X401 oscillate
waveform is normal
ReplaceU501
U401
Replace X401
Measure U201 PIN2=1.8V ;
Check Correspondent
component
Check U501
X401 oscillate
waveform is normal
Replace U201
OK
OK
OK
OK
OK
NG
NG
NG
NG
Check reset circuit of
U501/U401 is normal
Check HS/VS from
CN401 is normal
Replace X401
Check Correspondent
component
NG
NG
OK
Replace U401
OK
Replace U501
NG
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