ASUS T500 MB Service Manual
6
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
