Samsung SGH-ZV30 Service Manual page 36

Flow Chart of Troubleshooting
7-8. Back Light (for Color Main LCD)
Backlight does not work
Is BACKLIGHT set
AlwaysON in the Menu?
L501 ¡ Ã 3.3V
Replace the LCD Module
Yes
Yes
Yes
Yes
END
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No
Set BACKLIGHT on AlwaysON
No
Replace or Resolder L501
ZD504
EAR1OP_CON
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MEGA_2.5 VBATT
C510 C511
CN505
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