LG LAEC015 - Power Error Troubleshooting

Standard Repair Process
B. Power error
No Power to entire screen
Established
date
Revised date
Error
symptom
OK?
Entire screen
is Black
Y
Check the power of FPGA
board(12V)
N
☞B1_②
☞B1_③
Check the power supply
status of the Main board.
(5V_ST)
OK?
Y
N
Replace M16PP board
Replace Power cable
between Main and FPGA
OR
AIO136
LED SIGNAGE
OK?
Y
Check the power supply
status of the Main board.
(12V)
N
Replace 12V PSU
Check the AC cable
connection of
internal cabinet
OK?
N
Replace AC cable
Check AC power Cord
☞B1_①
5
Check Power Controller
Board
Replace Power
Controller Board
OK?
N
Replace AC power Cord
Y
☞B4
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