Epson ES-1200C - Manual (Page 49)

The OPERATE OPERATE light does not come on.
Make sure the power cable is correctly plugged into the
scanner and the power outlet.
The READY READY light does not come on.
Make sure the scanner is correctly connected to the computer
and that the computer is turned on.
The scanner does not start scanning.
See that the scanner’s READY light is on.
Make sure that you have selected the correct interface port and
settings with your software. Also make sure the interface board
on your computer is properly installed.
If you are connecting the scanner with the SCSI interface, see
that the terminator and SCSI ID are correctly set up.
If you have other expansion boards in your computer, see that
they are not interfering with the interrupt setting of the
interface board for your scanner. (See your computer manual.)
3-4 Troubleshooting