Troubleshoot receipt printer in Sunlync

This article provides a step-by-step guide to help users troubleshoot issues with the Star TSP100 receipt printer and cash drawer when they are not printing or opening as expected. It explains how to verify that the printer is recognized by Windows, confirm that the correct drivers and COM port are set up, and ensure the device is properly configured inside SunLync. The article walks users through the basic checks—such as reconnecting cables, confirming printer visibility, running the TSP Utility health check, and reviewing SunLync printer and cash-drawer settings—before recommending escalation if the issue continues.