If you are having issues with your equipment, below are a few things to try before contacting service:

• Check that the fuses are not blown. (There may be fuses on the rear of the tester as well as the front.)
• Check that the fuses are the correct values.
• If you have other cables, try swapping the cable to see if the problem follows the cable or stays with the tester.
• Have you downloaded the USB Driver?
• Try a different USB connector on your computer.
• Try a different USB cable.
• Try plugging the tester into a different outlet.
• If you are using an inverter, try plugging the tester directly into a wall or traffic cabinet outlet.
  
• Check that you have the current software and firmware. (They can be found on each products' page. Click "Products" on the top of this page or use the Search feature.)

If you are still having trouble, please click the link to "Contact Us" or "Schedule Service" on the top of this page.