Sorry to hear that. Can you try some of our troubleshooting tips? https://squareup.com/help/us/en/article/5203-square-magstripe-reader-troubleshooting
If those don't work, you may want to order a new reader from your online Dashboard: https://squareup.com/help/us/en/article/5067-get-a-free-square-magstripe-reader
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