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ASUS T500
3. Blank screen
Solution:
1
Check if the backlight chip U1704, driver chip U1780 has soldering deviation
2
Check the LCD connector's assembly is normal, if not please re-assemble
3
Check if L1701(L1780)'s conduction is normal, and compare its' voltage on normal MB
4
Check if D1702's conduction is normal or the component's soldering is reverse
5
Check if LCD_BACKLIGHT_PWM's signal is normal, and adjust this signal's backlight brightness
6
Check if VBAT's power supply is normal
MB Service Manual
6
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