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If not, you should perform a Reset on the Dymo Labeler itself: (

SE300 only)-

1. Turn off the label printer.
2. Hold down the form feed button on the front and do not let go while you turn the printer back ON.
3. The green LED will flash - as soon as it does this let go of the form feed button.
4. Turn the label printer OFF.
5. Hold down the form feed button on the front and do not let go while you turn the printer back ON.
6. As soon as the green LED is Solid, let go of the form feed button.
7. If no label advances. Repeat Steps 1 - 6 to try again.
8. If a label does advance partially, consider using a new roll of labels or contact Dymo Support, as this is not expected behaviour.
9. If the label advances correctly, try sending another label directly from DVMAX. If it works, then you're good to go. If not, proceed to Step 3 - Verify Settings and Test Label in DVMAX.

SE450 - 

1. Unplug both the data cable and the power cable
2. Leave unplugged for a full 60 seconds
3. Plug in the data cable and power cable

To test the label printer only and ensure test labels are printing correctly: (SE450 only) 

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