Epson EPL-N2750 Reference Manual page 194

Reset All
All printer settings have been reset to the user default
configuration, or to the last settings that were saved.
Reset to Save
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.
ROM CHECK
The printer is checking the ROM.
RAM CHECK
The printer is checking the RAM.
Self Test
The printer is performing a quick internal check.
Service Req xxxx
A controller error or a print engine error has been detected. Write
down the error number listed on the LCD panel (xxxx) 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.
Standby
The printer is in its low power state; however, it is still online if
the On Line light is on.
Troubleshooting
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