The PR4 will only “light up/power ON” when it is connected to a computer via USB. Simply connecting the PS14 will not power the device and cause any lights to come on.
Please follow the complete PR4 installation instructions consisting of PR4 Driver and Software Installation and PR4 Hardware Installation to power and test your PR4.
Using the PS14 power supply is only required when using the PR4 for Sound/Decoder programming.