Epson EPL-N2750 Quick Reference Manual page 25

You have changed the SelecType setting but the new
setting was not activated immediately after exiting
SelecType. To activate the new setting, do one of the
following: 1) exit SelecType by pressing Continue or
On Line (the new setting is activated after the current
print job is finished), or 2) reset the printer by pressing
the ALT and Reset buttons at the same time.
The printer is checking the ROM.
The printer is checking the RAM.
The printer is performing a quick internal check.
A controller error or a print engine error has been
detected. Write down the error number listed on the
LCD panel ( ) and turn off the printer. Wait at least
five seconds and then turn it back on. If the error
message still appears, turn off the printer, unplug the
power cord, and contact a qualified service
representative.
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