Po
w
er bo
a
rd not
w
or
k
1.
V
eri
f
y i
f
the po
w
er cord connect
w
ell?
2
.chec
k
i
f
the po
w
er supply i
f
w
or
k
in
g
nor
ma
lly ; chec
k
i
f
the po
w
er supply o
f
+5
V
st
a
ndby is
w
or
k
in
g
nor
ma
lly;
3.
chec
k
i
f
the POWER ON/OFF
volt
ag
e is hi
g
h pressure;
4.chec
k
i
f
the po
w
er supply h
a
ve
+1
2V
/+5
V
output;
Chec
k
i
f
M
a
in bo
a
rd / L
V
D
S
w
ire /
P
a
nel
a
re in
g
ood condition ?
- 49 -