i bought a used traktor kontrol s4 on ebay. it powers up but the usb light flashes only.
You wrote:
black jogwheels
So, you have the Traktor Kontrol S4MK1.
Go to the following links to check, if your OS supports the Traktor Kontrol S4MK1.
Compatibility on WINDOWS
Edit: Here is the important part reproduced…
Product
Windows 7
Windows 8
Windows 10
TRAKTOR KONTROL S8*
4.1.0
TRAKTOR KONTROL S5*
4.2.0
TRAKTOR KONTROL S4 MK1
3.1.0
Quote:
If your device is not lighting up when connecting it, verify that the latest Controller Editor version has been installed.
More links:
https://www.native-instruments.com/en/support/downloads/drivers-other-files/
How to Update the Firmware of Your NI Hardware
For the sake of completeness, which model exactly, on which hardware and operating system are you trying to start it, which Traktor version?
Any Update? @jokerz34
7sorry my computer has been down
traktor s4, windows 10
Which model?
Mk1, Mk2 or Mk3?
Visually: Black jogwheel top, silver jogwheel top or big and motorized jogwheels?