A: Some external devices such as multi-port adapters with LED indicators will hold inputs on. These LED's trigger sinking inputs when sourcing devices are used (or visa-versa). Remove these types of devices from circuit or contact Kurt Technical Support for information on disabling auto source/sink detect feature.
For further assistance please contact Kurt Electronics technical support at or check www.kurtelectronics.com for updated troubleshooting information, software updates and other problem fixes.