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SGH-S400i Flow Chart of Troubleshooting
2-
28
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2-1-10. LCD Part
LCD does not work
Check the LCD Module
No
Power On ?
Backlight On ?
Replace the LCD Module
Check the 'power on part'
END
No
Yes
Yes
VR117 is High ?
Check the UCP201
No
C114(LCD part) is High ?
No
Yes
Yes
Pin #4 of U100 is High?
Check the R102
No
Yes
Check the U100
Pin #1 ≥ 10V ?
Check the U100
No
Is there any signal pin #35
~ 52 of SLC101 ?
No
Yes
Is there any signal pin #9 ~
25 of SLC103 ?
No
Yes
Is there any signal pin #7 ~
23 of SLC102 ?
Check the SLC102
No
Yes
Check the FPCB
Check the U300
Check the FPCB
No
Yes
Yes