QuantAsylum QA403 Audio Analyzer USB Connection Problem & Solution

i had some weird problems with my QuantAsylum QA403 Audio Analyzer and i searched internet about this. i saw some people has same problems with their own units. i open my QA403 and i find something inside. Symptoms : ( sometimes ) * false and/or crazy measurements readings * some weird jumps on FFT * you can't control your QA403 with software * everything going crazy on the software and QA403 * QA403 's USB communication is lost with PC and software frozen if you have these problems with your QA403 sometimes , maybe this video can be helpful for you...