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4 Troubleshooting
4-3
Is pin9 of
CN500(BKLT_EN)high(3.3V)?
4-2 No Video (PC Analog Signal)
5
Check TFT_LCD panel or inverter
and connection between then.
Yes
No
Does the analog video signal
appear at R134, 136, 138
(Red,Green,Blue)?
Check pc signal.
Yes
No
Does the X300
oscilate Properly?
Check the X300.
No
Yes
Does the proper clock pules
appear at Pin6,7 of
the CN400?
Check CN400.
No
Yes
Replace LCD Panel.
6
7
8