What Am I Using?
USB device not detected?
Compare a direct USB port, data-capable cable and second compatible device to narrow down a missing USB accessory.
Does it work when connected directly to another port?
Avoid disconnecting an external drive during writes. Eject it first if the system recognises it.
Device and operating system
Check the hub, cable or port that failed
A hub may lack power or a cable may carry charging without data.
- Use the known working port and cable as a baseline. Add the hub or adapter back by itself.
- If only one port fails with several accessories, note which port and contact the device maker.
Check the accessory on a second compatible device
A second host can help distinguish an accessory fault from a problem on this device.
- Try a known data-capable cable if removable, then another compatible host if available.
- If the accessory needs software, use the official maker’s download or your IT team.
Identify what the port and accessory support
Matching USB plug shapes can hide differences in power, data and video support.
- Check the model labels and whether the device needs its own power adapter.
- Record whether it charges, lights up or shows any error, then contact the manufacturer.