The Printer Does Not Print (Ready Light Off); The Ready Light Is On But Nothing Prints - Epson WorkForce AL-M300 Series User Manual

Cause
The printer is in the sleep mode (the Wakeup/Sleep
button lights).
The printer is in the power off mode. (For EU models only)

The printer does not print (Ready light off)

Cause
The printer is offline. The printer is paused by pressing
the Pause/Release button.
Some error may have occurred.
The printer is in the power off mode. (For EU models only)

The Ready light is on but nothing prints

Cause
Your computer may not be properly connected to the
printer.
The interface cable may not be plugged in securely.
You may not be using the correct interface cable.
Your application software is not properly set up for your
printer.
Your computer system's memory is too small to handle
the volume of data in your document.
AL-M300/AL-M400 Series
What to do
Press the Wakeup/Sleep button to return the printer to ready
status.
Turn on the power switch.
To not enter the power off mode, set Power Off Timer to Off in
Energy Saver Menu on the control panel.
What to do
Press the Pause/Release button once to switch the printer to
ready status. Make sure that the Ready light turns on.
Check the LCD panel to see if an error message appears.
Turn on the power switch.
To not enter the power off mode, set Power Off Timer to Off in
Energy Saver Menu on the control panel.
What to do
Perform the procedure illustrated in the Setup Guide.
Check both ends of the interface cable between the printer and
the computer.
If you are using the parallel interface, make sure that the cable is a
double-shielded, twisted-pair interface cable no more than six
feet in length.
If you are using the USB interface, use a cable that is compatible
with Hi-Speed USB.
Make sure that the printer is selected in your application software.
Try reducing the image resolution of your document in the
application software, or install more memory in your computer if
you can.
User's Guide
Troubleshooting 153