Epson EPL-N2750 Quick Reference Manual page 26

The printer is in its low power state; however, it is still
online if the On Line light is on.
The printer is almost out of toner. Prepare a new
imaging cartridge to replace the current one.
You must replace the imaging cartridge. See "Replacing
the Imaging Cartridge" on page 26.
Press Continue to print one more page.
The printer is warming up. When the printer is ready,
this message will change to .
There is no ROM module installed in slot A, or the
installed module cannot be written to. It is also possible
that writing to the ROM in slot A began, but was not
completed.
To correct this error, do one of the following: 1) turn off
the printer and remove the ROM, then turn on the
printer, 2) reset the printer by pressing the ALT and
Reset buttons at the same time.
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