Update: Even the replacement cable loses connection between the camera and the laptop every few seconds, as does the first cable. Actually, it's a little worse. Using the other two USB cables and the amp extension cable, the connection between the camera and laptop is secure, so there was an issue with the Tether Tools cable. a few seconds. When using other cables on the same ports, the connection to the camera is reliable, so the cable from Tether Tools is suspect. When comparing the USB-A…