LC-70UD1U
6 – 3
4) Communication failure details (POWER Green LED Flashes  3 times, and DPC/SLEEP LED flashes)                      Note
5) Other failure details (POWER Green LED Flashes  4 times, and DPC/SLEEP LED flashes)                                       Note
Error type Center icon LED operation
Basically, debug print logs are analyzed or communica-
tion logs are analyzed by a bus monitor.
Initial communica-
tion reception failure
Flashes fast once
H: On
L: Off
Initial communication from the main CPU is not received. 
(Request for the monitor model No. is not received.)
→ Communication line failure or main CPU start-up failure
Start-up confirma-
tion reception failure
Flashes fast twice
H: On
L: Off
Start-up reason confirmation from the main CPU cannot be 
received. (Start-up communication until start-up reason notifi-
cation command is not received.)
→ Main CPU start-up failure or monitor microcomputer recep-
tion failure
Regular communica-
tion failure
Flashes fast 3 times
H: On
L: Off
Regular communication that is performed at 1 second inter-
vals in the normal operation is interrupted.
→ Main CPU operation failure or monitor microcomputer 
reception failure
Other communica-
tion failure
Flashes fast 5 times
H: On
L: Off
When a request (PM_REQ=H) is sent from the main micro-
computer, the request command is not output from the main 
CPU, etc.
→ Main CPU operation failure or monitor microcomputer 
reception failure
Error type Center icon LED operation
Pins are monitor microcomputer pins unless otherwise 
specified.
Monitor temperature 
failure
Flashes fast once
H: On
L: Off
If the panel temperature is 60°C or more for 15 seconds or 
more in a row, CAUTION appears on the OSD (flashes in red 
in the lower right screen).
If the panel temperature is 60°C or more for 25 seconds or 
more in a row, error standby is activated.
Main failure
Flashes fast 3 times
H: On
L: Off
Main microcomputer detection error (CPU temperature error, 
etc.)
The details are displayed on page 1 of the adjustment process 
mode.