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Y
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
N
Y
N
No audio & No backli
g
ht
Led indicator “red” on
Check the 5VSTB on “CON8”
Press the “ON/OFF” on keyboard &
remote control
,
led turns
g
reen
Check the AC input on
p
ower su
pp
l
y
board
Upgrade the software
Change the
AC line
Check the
fuse on power
supply board
Done
Change
the fuse
Change the
power supply
b
oard
Done Done
Upgrade the
software
Check the 5V, 12V & 24V
on
p
ower su
pp
l
y
board
Change the
power supply
b
oard
Check the
“ON/OFF” voltage
on “CON8”, should
be greater than 2.7V
Check “Q3” &
“U41” Pin81 if
it works well.
Change
the panel.
Done
Upgrade the
software
Change the
“
Q
3” or “U9”
Change the “U41” Done
Done
Done
Done
Upgrade the
software
Done
Done
Change the EEPROM U43
“ATMEL 24C64”
Done
Done
Check all DC power
su
pp
l
y
on U41
Chang the power
su
pp
l
y
IC for U9
Change the
Main IC “U9”
Change the
Main
b
oard
Done
Done
Done
Service Flow Chart
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