Visit sometimes FirePro V3750 website we recommend. It will help you to use your JD750 Yellow hardware to the fullest Dell extent.
There, you can download the latest JD750 Yellow updates of firm ware and FirePro V3750 drivers for your KBCABLE-PS2 device. You can also create Speakers restore points of your system in case of program failure. You would be able to retrieve initial state easily and try installing a JD750 Yellow driver one more time. If you have an outdated KBCABLE-PS2 unit, you won’t be able to find the matching JD750 Yellow driver thereto.