Acer VG272 - Installation

17
5. Troubleshooting
5.1 Test flow for abnormal machine:
Start
Check DC Power is
19V(F1)?
Power cord plug
into AC source
AC
power?
Check Power Board
Key’s LED
indicator is light
or blink?
No input signal
Black screen
but a little
brightness
Re-insert 30pin edp cable
between LCM and main board
Still BLACK
screen?
5VD_REG, 10VD_REG
on main board is
normal?
Check Main board
LCM damaged
END
N
Y
blink
light
Y
N