Epson EPL-6100 Reference Manual page 202

ROM Module Incompatible
Control panel:
The ROM module in slot A is not installed correctly or is invalid
for this printer. Make sure you are using a proper ROM module,
or reinstall the module. See "ROM Module" on page 19 for
installation instructions.
Toner Out
Control panel:
Replace the developer cartridge. See "Replacing the Developer
Cartridge" on page 73. To clear this error and print a single sheet,
press the N Start/Stop button on the control panel. After that, this
error will occur again until the developer cartridge is replaced.
Check Paper Size
Control panel: m light flashing
The paper size setting in the printer driver is different from the
size of paper loaded in the printer. To print on the correct paper
size, make sure you load the appropriate paper into the printer.
To clear the warning, press the @ Information button on the control
panel.
100 Troubleshooting
and Error lights on
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light on, Error light flashing (slowly)
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