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SGH-S400i Flow Chart of Troubleshooting
2-1-10. LCD Part
LCD does not work
Power On ?
Yes
Backlight On ?
Yes
Is there any signal pin #35
~ 52 of SLC101 ?
Yes
Is there any signal pin #9 ~
25 of SLC103 ?
Yes
Is there any signal pin #7 ~
23 of SLC102 ?
Yes
Check the LCD Module
Yes
END
This Document can not be used without Samsung's authorization
No
No
VR117 is High ?
C114(LCD part) is High ?
Pin #4 of U100 is High?
Check the U100
Pin #1 ≥ 10V ?
No
No
No
No
SAMSUNG Proprietary-Contents may change without notice
Check the 'power on part'
No
Yes
No
Yes
No
Yes
No
Yes
Check the U300
Check the FPCB
Check the SLC102
Replace the LCD Module
2-28
Check the UCP201
Check the FPCB
Check the R102
Check the U100
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