Samsung SPH-A900 - Lcd Working

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Flow Chart of Troubleshooting
7-4
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7-1-2 LCD Working
Insert Power
Main LCD Back
-light On?
LCD Display
OK?
Check pulse
of HDC500's
pin18
Check HDC500,
F502, F503
F504,F505 and
it's Short=?
Yes
Yes
NoNo
Yes
No
No
Yes
Check HDC500 and it's
neighboring circuits
Replace HDC500,
F502, F503 F504,F505and
it's neighboring circuits
Change LCD
Change LCD
END