Windows 10/116 min readReviewed 2026-07-29

Keyboard lights up but no keys work over USB-C

Prove whether a detachable USB-C cable carries data instead of assuming keyboard lighting means the connection is complete.

Quick diagnosis

RGB proves that power reaches the keyboard; it does not prove the cable carries USB data.

1
Use a known data cable
Connect the keyboard directly to the PC with a cable proven to transfer data.
2
Reseat both ends
Ensure a recessed keyboard connector is fully inserted and not blocked by the case opening.
3
Compare another port and PC
Keep the known-good cable and test a second direct port, then another computer.
4
Inspect Windows detection
Check whether Device Manager changes when the keyboard is connected.

Use a compliant cable of suitable length whose data function has been verified.

Connect directly or replace the confirmed intermediary.

• If the keyboard has power but no data on multiple PCs and known-good cables, use warranty service for its connector or controller.

Yes. Some cables or failed conductors provide power while the USB data path is absent.

USB Type-C system overview
USB-IF. USB power and data capabilities are separate properties of a connection.
Mouse and keyboard problems in Windows
Microsoft Support. Direct-port, battery, cable, hub-bypass, driver, and cross-PC diagnostic order.

Diagnose it in this order

Connect the keyboard directly to the PC with a cable proven to transfer data.

Ensure a recessed keyboard connector is fully inserted and not blocked by the case opening.

Keep the known-good cable and test a second direct port, then another computer.

Check whether Device Manager changes when the keyboard is connected.