Dymo LabelWriter SE300 User Manual page 112

1. If a label roll is not already loaded, load a roll as
described in Chapter 1. Make sure to use 2 inch wide
labels for the test.
2. Be certain that the printer is off, the power cord is
connected, and the printer cable is not connected to the
printer.
3. Press the form feed button and hold it down as you turn
on the LabelWriter. The LabelWriter will print a DYMO
marquee bounded by 2 horizontal bars, as well as internal
printer settings.
4. End the self test by turning off the LabelWriter.
5. Reconnect the printer cable and turn the printer back on.
Check the Labels
If the LabelWriter fails the self-test, check to see if the labels are
loaded improperly or if the printer cable is plugged in (the printer
cable should not be connected during the self-test). Reload the
labels and retry the self-test.
= If the on/off indicator is flashing and labels are loaded,
inspect the labels to look for jammed, damaged, or
crimped labels. Reload the labels according to the
instructions in Chapter 1.
B-108