Make sure that the second computer is meeting the product's system specifications and that the device's driver has been installed. It is also useful to test the NI device on another computer. Warning: If you attempt to use another third-party power supply, make sure that it has the same specifications as the NI power supply (output wattage and current), otherwise there is a risk of voiding the device's warranty. NI Hardware Devices Requiring a 40W Power Supply TRAKTOR AUDIO 2 (optional, required only for its use with iOS).NI Hardware Devices Requiring a 18W Power Supply
We strongly recommend trying out only another official NI power supply unit ( 18W or 40W depending on your NI device model - see below). Some NI devices require an external power supply for their operation, in which case it is worth trying a different power supply. Although it is common to operate an NI hardware device via a USB 3.0 port as they are found in new generation computers, some systems may pose some connectivity issues with USB 3.0 ports.