Brother DCP-L8400CDN Service Manual page 114

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Error code D800
Touchscreen initialization failed
Remove any material which is on the touchscreen.
Error occurred during touch panel initialization.
Error code D900
-
-
Communication between the panel PCB and main PCB is unavailable during touch panel
initialization.
Error code DA00
-
-
After the initialization of the panel PCB, no response was sent from the panel PCB for a period
of time.
Error code DB00
Print Unable DB
Turn the power off and then back on again.
USB communication between the main PCB and panel PCB is unavailable.
Step
1 The version of the panel
firmware and the main firmware
do not match
2 Connection failure of the panel
PCB harness
3 Connection failure of the touch
panel flat cable
4 Connection failure of the Key
PCB flat cable
5 Panel PCB failure
6 Touch panel ASSY failure
7 Key PCB failure
8 Main PCB failure
Cause
Install the latest panel firmware and main
firmware.
Reconnect the panel PCB harness.
Reconnect the touch panel flat cable.
Reconnect the key PCB flat cable.
Replace the panel PCB unit.
Replace the touch panel ASSY.
Replace the panel cover ASSY.
Replace the main PCB ASSY.
2-84
Remedy
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