Acer B277 - Connecting and Power

15
5. Troubleshooting
5.1 Test flow for abnormal machine:
Start
Check DC Power
is 19V?
Power cord plug
into AC source
AC
power?
Check adaptor
Key’s LED
indicator is light
or blink?
No input signal
BLACK screen
but a little light?
Re-insert 30pin LVDS cable
between LCM and main board
Still BLACK
screen?
5VD_REG,3V3D_REG
and 1VD_REG on main
board is normal?
Check Main board
LCM broken
END
N
Y
blink
light
Y
N