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Troubleshooting
4-1-6 No LCD Backlight
Symptom
LCD Backlight does not turn on
1 LED must turn on when a button is pressed unless the backlight time control is set to 0
Major Checklist
2 Check if the LCD backlight connector is broken. [LCD single part check]
No LCD Backlight
Can the USB
connection be made and MP3
files be played?
Yes
Does it work after
replacing the LCD?
Yes
Completion
4-12
second. If they do not turn on, check if the PORT below maintains at HIGH.
No
No
Does it work after upgrading to
the latest firmware?
Yes
1
Did IC300 2PIN
become Enable?
Yes
Refer to wave pattern
Replace the BOARD
(needs thorough examination).
No
Completion
image of Table 4-5.
Samsung Electronics
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