Acer V277 Lifecycle Extension Manual page 17

Panel debug flow (bi):
LCM power Debug
Disconnect LVDS cable
Y
Check LCM power
Replace panel
(R500) 5V ok?
N
Check Q500 pin2 is
5V?
Check set is ok?
N
N
Y
N
Check Q501 pin2
Y
is high?(＞2.4V)
Check U400 works
Y
END
Replace Q500
17