No any
response
Plug in the
power cable
or
try another cable
If not power cable no
problem, please open the
back cover to check
power
supply
Indicator light on power
supply light up.
Indicator light on power
supply not light up.
Main board(display board)
damage
Fusing or wires from socket to power supply loose
Indicator light on power
supply flash
Power supply damage
Power supply damage
Some color die
1. check the corresponding color’s sensor
6075
on main board. Use multi
‐
meter to check if voltage exist on the first and third
foot. If no voltage, then change this sensor or the whole board
2. If
6075
exist voltage, check corresponding color’s sensor
LM317S
on LED board. Use multi
‐
meter to check if voltage exist
on the first and third foot. If no voltage, then change this sensor.
3. If
LM317S
and
6075
existing voltage
,
check the solder on the led foot, weld the corresponding color’s led foot.
Out of control
Change the
100ohm resistance
on main board. If problem still exist, then change the sensor
75176
or change the main board
No memory
Change the sensor
ATML HXX64DH
on main board. Or change the whole main board.
If power supply no
problem, please check
program IC
on main board
Use multi
‐
meter to check if 24V voltage exist on the
terminal for main board power
supply
. If no 24V, change the
program IC
or change whole main board
QP05_GamutPARH7 Troubleshooting Guidelines