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No power to the printer.
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Power supply has tripped (over-current/over-voltage/temperature issue).
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Check the cables and connections on the formatter and at the control panel.
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Faulty components installed on the formatter (for example, memory DIMM or disk drive).
●
Faulty control panel.
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M631dn only: Make sure that the embedded MultiMedia Card (eMMC) PCA is fully seated.
●
For touchscreen models, use the control panel checks section in the printer Troubleshooting Manual to troubleshoot the control
panel
1. Verify that power is available to the printer. If the printer is plugged into a surge protector or
uninterruptible power supply (UPS), remove it, and then plug the printer directly into a known operating
wall receptacle (make sure that the wall receptacle provides the correct voltage and current for the
printer).
2. Make sure that the power switch is in the on position.
3. Make sure that startup noises are heard, which indicates that the power supply is operational.
4. Make sure that the control-panel display wire harness is connected (at both ends).
5. Make sure that the formatter connectors are fully seated. Make sure the power switch is in the on
position, and then verify that the heartbeat LED is blinking.
6. Remove any external solutions, and then try to turn the printer on again.
7. If the control panel display is blank, but startup sounds are heard after the printer power is turned on,
try printing an engine-test page to determine whether the problem is with the control-panel display,
formatter, or other printer assemblies.
ENWW Troubleshooting process 111
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