Standard Repair Process
A. Video error
No video (partial screen turns into black)
Established
date
Revised date
Error
symptom
2
OK?
partial screen
turns into black
Y
Make sure the cables below are properly connected
- LAN (Video data connection)
- DC POWER CABLE (3.8V PSU connection)
N
N
Check cable connection
① LAN connection between HUB Board
② Power connection between 3.8V PSU
☞A2_ ②
Replace HUB Board
Check LDM Module
Multiple LDM remain
black screen?
Y
N
OK?
N
Y
Replace LDM Module
Check LAN cable
(Internal connection of
LAN cable)
Check Connection of LAN
cable between left half and
right half cabinet
OK?
N
Y
Re-connect LAN
cable between left
half and right half
cabinet
OK?
N
Y
Replace LAN cable
AIO136
LED SIGNAGE
Check If only the
vertical 2ea of LDM are
problem
OK?
N
Y
Replace HUB Board
Replace FPGA Board
☞A2_ ①
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