Troubleshooting
Miscellaneous Issues
186
P1066582-003 ZT400 Series™ User Guide 8/25/15
The printer locks up
while running the
Power-On Self Test.
Main logic board failure. Call a service technician.
The printer is not
acknowledging a USB
device or is not
reading the files on a
USB device that is
plugged into the USB
host port.
The printer currently supports
USB drives only up to 1 TB in
size.
Use a USB drive that is 1 TB or smaller.
The USB drive may require its
own external power.
If your USB drive requires external power, make
sure that it is plugged into a working power
supply.
Table 21 • Miscellaneous Printer Problems (Continued)
Problem Possible Cause Recommended Solution
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