F10 The output image is ‘random’ character string.
F11 No image output.
F12 Button does not function.
F13 The LED indicator off.
F14 Fresh toner cannot be sensed.
Print cartridge improperly installed in the printer.
Reinstall the print cartridge.
Chip on new print cartridge error.
Change the chip on cartridge.
Data control board error.
The FFC connecting engine board and data board
is badly contacted or unreliable.
Change for a new engine board.
FFC connecting movement control card and
printing control card poorly contacted or
unreliable.
Change for a new engine board.
Replace the print cartridge.
FFC connecting engine board and data board is
badly contacted or unreliable.
Replace with new buttons.
Replace with a new engine board.
The FFC connecting engine board and data board
is badly contacted or unreliable.
Make sure the FFC is contacted reliable, change it
if necessary.
The LED indicator damaged.
Change for a new LED indicator.
Change for a new engine board.
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