5-6
Troubleshooting
Section 5
SD C
ar
d
insert
ed
properly?
Ri
bb
on
c
ab
le
in
p
la
ce
?
Display board
LED lit
?
Ins
ert
ne
w SD
card
Inse
rt
S
D
c
ard
pr
ope
rl
y
Co
nnect ribbon
cable
co
nnection
Repla
ce the
to
uchscree
n
and reuse
old SD ca
rd
Y
Y
N
N
N
Y
Ri
bb
on
c
ab
le
in
p
la
ce
?
Co
nnect ribbon
cable
co
nnection
N
Re
pl
ac
e t
he
to
uchscree
n and
re
us
e o
ld
S
D c
ar
d
Y
Chec
k UI
software
ver
sio
n
Issue
go
es
awa
y aft
er a
reb
oo
t?
Re
pl
ac
e t
he Wi
‐
Fi
do
ng
le
N
Y
Late
st
software
?
Repl
ace
SD c
ar
d
wit
h the
la
test
SW
Is
su
e
goe
s
away after a
re
boot?
Repl
ace
the
UI
and re
use o
ld S
D
car
d
N
N
Y
To
uc
hs
cr
ee
n i
s
black
Touch
screen
lo
oks white with
m
ul
tipl
e c
ol
or
ed
lines
Touch
screen
respo
nd
s very
slowly or does
not respond
to
touc
h
B
Issue exists?
Re
plac
e t
he
touchscreen
and
reuse
the old S
D
card
Y
Y
Y
Y
To
uc
hs
cr
ee
n i
s
stuck on the
‘Mer
co
’ sc
ree
n
Repl
ace
SD c
ar
d
wit
h the
la
test
SW
Is
sue e
xi
st
s?
Replac
e the
to
uc
hs
cr
ee
n a
nd
reuse
old SD card
Y
FA
S ONLY!
FAS
ONLY!
FA
S O
NLY!
Touch
screen
be
haves
abnormally
or
has
ph
an
to
m
to
uc
he
s
Re
pl
ac
e t
he
to
uchscre
en and reuse
ol
d
SD
c
ar
d
D
is
pl
ay
Is
su
es
T
ro
ub
le
sh
oo
ti
ng
Y
Y
FA
S O
NLY!
FA
S O
NLY!
