User manual

3S
S
ys
t
em se
lf
t
es
t
initialization
(
POST
)
fails
3S-1S-2S
Th
e secon
d
DMA
con
t
ro
ll
er
failure or re
g
ister failure
1S-1S-2S Mainboard failure 3S-1S-3S
INTMSK
(i
n
t
errup
t
mas
k
re
g
ister） failure
1S-1S-3S
N
o power o
f
ma
i
n
b
oar
d
battery or CMOS is
broken
3S-2S-4S
K
ey
b
oar
d
ti
mer
f
a
il
ure.
Reinstall in CMOS or skip
POST
1S-1S-4S ROM BIOS test failure 3S-3S-4S
Di
sp
l
ay
RAM
f
a
il
ure or no
RAM
,
non-fatal failure
1S-2S-1S System time failure 3S-4S-2S
Di
sp
l
ay
d
a
t
a
li
ne
l
oose,
video card not plugged well,
or video card broken
1S-2S-2S
DMA
c
h
anne
l
i
n
iti
a
li
za
ti
on
failure
3S-4S-3S
ROM
BIOS
o
f
v
id
eo car
d
no
t
found
1S-2S-3S
DMA
c
h
anne
l
reg
i
s
t
er
failure
4S-2S-1S
S
ys
t
em rea
l
-
ti
me c
l
oc
k
failure
1S-3S-1S
M
emory c
h
anne
l
re
f
res
h
failure (any memory
bank
)
4S-2S-2S
S
ys
t
em s
t
ar
t
f
a
il
ure,
CMOS
setting failure or BIOS
broken
1S-3S-2S
Base memory failure
(memory bank broken or
RAM setting failure)
4S-2S-3S
G
a
t
e
A20
sw
it
c
h
i
n
k
ey
b
oar
d
controller (8042) failure,
BIOS can not be switched to
p
rotected mode
1S-3S-3S
B
ase memory
f
a
il
ure
(maybe the memory ban
k
on the DIMMC slo
t
broken
)
4S-2S-4S
Protected mode interrupt
failure
1S-3S-4S
Assistant interrupt mas
k
register failure
4S-3S-1S
M
emory
f
a
il
ure
(
memory
bank broken or RAM setting
failure
)
1S-4S-1S
S
ome a
dd
ress o
f
b
ase
memor
y
failure
4S-3S-3S
Th
e secon
d
c
l
oc
k
o
f
sys
t
em
failure
1S-4S-2S
P
ar
it
y c
h
ec
k
o
f
sys
t
em
base memory (the firs
t
64k
)
failure
4S-3S-4S Real-time clock failure
1S-4S-3S EISA BUS timer failure 4S-4S-1S
S
er
i
a
l
por
t
s
(COM
por
t
,
mouse
p
ort
)
failure
1S-4S-4S EISA NMI port failure 4S-4S-2S
P
ara
ll
e
l
por
t
s
(
or
LPT
por
t)
failure
2S-1S-1S
S
ys
t
em
b
ase memory
(the first 64k) chec
k
failure
4S-4S-3S
Di
g
it
a
l
coprocessor
（
8087
,
80287, 80387, 80487 ）
failure
L: Long Beep
S: Short Bee
p
10. Common Problems & Solutions
1) Failures & Solutions (Note: Make all treatments after shutting down the
power)
Problems Reasons Suggested Solutions
Memory bank
M
emory
b
an
k
no
t
p
l
ugge
d
well
Plug it again
Memory bank broken Try replacing the memory bank
Th
e
b
o
tt
om o
f
memory
b
an
k
dirt
y
Wi
pe
b
y ru
bb
er or c
l
ean
b
y pure
ethanol
,
then tr
y
a
g
ain
N
o
t
ma
t
c
hi
ng w
ith
o
th
er
memor
y
banks
Use matching memory banks
Memory slot Slot dirty and impure Clean the dirt or impurities
29