HP LaserJet Enterprise M552 - Communication lost message appears on the control panel in five different languages; Cooling device; Data received

4. Reconnect the connector (J26) of the right door switch and connector (J115) on the DC controller PCA.
5. If the problem persists, Elevate the case for resolution.
Communication lost message appears on the control panel in ve dierent languages
Description
A Communication Lost message appears on the control panel in ve dierent languages.
The communication path from the control panel to the formatter includes the Control Panel, USB cable, image
control board (ICB), and the formatter.
Recommended action
1. Power down the printer and re-seat the formatter.
2. Re-seat the USB cable connection at the rear of the control panel (swing the control panel up 90 degrees
for better access).
3. Turn the printer o and then back on again.
4. Does the message reappear in 20 - 30 seconds?
5. If YES:
Check the Heartbeat LED on the formatter (is it ashing?).
If the Heartbeat LED is NOT ashing, replace the formatter.
If the formatter Heartbeat LED is ashing, then the Communication Lost message could also be caused
by:
●
Bad USB connection at the ICB
●
Bad Control Panel
●
Bad ICB
6. If the error persists after replacing the formatter, or formatter is good, the control panel USB cable
might not be seated properly at the ICB connection on top of the engine.
Cooling device
Description
The printer is cooling.
Recommended action
No action is necessary.
Data received
Description
The printer is waiting for more data to continue the print job. To print the remaining data, touch the Clear
button. To close the dialog and wait for the command to print the last page, touch the OK button.
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