CONFIDENTIAL
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DO NOT COPY
Page 9-1
File No. SG-0301
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Chapter 9 Trouble shooting
MONITOR
DISPLAY
NOTHING
(PC
MODE)
Start
LED is lighted
1.
Is Power Core Ready?
2.
Is J7-Pin1 5V ready?
J7-Pin 2, 3 Voltage normal?
3. Check Logo LED Circuit whether is normal?
4.
Is Main BD -J4 +5VSB, +12 ready?
5.
Is U1 (+5V) working ok?
6.
Is DC to DC Regulator normal?
LED is White?
1. Check Key Pad or Remote control is OK?
2. Check U12-Pin 91 whether it’s voltage level is low?
3. Check Logo LED Circuit whether is normal?
Is backlight on?
1. Is J8, PIN6, 8, 10, 12 that voltage 12V ready?
2. Check J8, PIN24, 26 PWM signal is OK?
3. Check J4, Pin14 whether it is high?
4. Check J4, Pin17 whether its voltage is 0~0.8V?
Is Display
Normal?
1. Video cable is OK?
2. Is P1 video input signal normal?
3. Whether U12 input/output signal of video signal is
normal?
4. Check J8 video signal whether is normal.
5. Is FPC Cable OK?
END
