N
N
N
N
Y
Y
Y
Y
NO
signal
and
the
laser
apparatus
working
abnormal
Check
the
power
supply
tor
5V
Check
the
power
supply
reset
and
clocd
for
U5is
normal
Check
if
the
3
.
3V
and1
.
8V
supply
is
normal
Updatc
the
softwarc
for
flash
/
U5
is
ok
Check
the
U5
and
the
periphery
circuit
Power
supply
trouble
(
NO
signal
)
N
Check
the
mainboard
suplly
for
dvd
Check
the
D1
、
D2
、
D3
、
Q1
、
Q2
、
U6
、
and
the
periphery
circuit
Check
the
correlation
circuit
Display
is
normal
Check
the
U5
and
the
video
output
5.1
