My Teslong Borescope quit connecting to the computer, the light at the lens end would light up, but the software wouldn't pick it up. Contacted Teslong customer service and through a series of emails they suggested I reload the app. Got that done and still nothing. I kept telling them that when plugging into the usb port I got no "honk", the computer never saw it as being there. Tried it on two computers with the same results. Finally I got an email stating that it was apparently broken, their warranty was 18 months and that ended 2 weeks ago. Their "fix" was simply, buy another one.