Repeated USB chimes point to power, cable, port, hub, device or driver instability. Move one component at a time and watch Device Manager. Try a known-good cable of the same type and see whether the reconnect chime stops. Connect it directly to a port on the computer and remove other high-power USB devices.
Differential
Likely causes of “USB device repeatedly connects and disconnects”, and how to tell them apart
- 1
A poor cable or a loose connector breaks the connection
What separates it The device disconnects when the cable is touched or moved, and the connector feels loose.
How to confirm Try a known-good cable of the same type and see whether the reconnect chime stops.
- 2
The port or the hub cannot supply enough power
What separates it The device drops when other high-power devices are connected, or when it is on an unpowered hub.
How to confirm Connect it directly to a port on the computer and remove other high-power USB devices.
- 3
A power-saving setting turns the port off
What separates it The device disconnects after a period of idle time, or after sleep and wake.
How to confirm Look at USB selective suspend and the device's power management options in Device Manager.
- 4
A driver or a chipset problem
What separates it The device shows a warning icon in Device Manager and reconnects repeatedly.
How to confirm Update the device driver and the chipset driver from the manufacturer.
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which Device Manager entry disappears and reappears when the chime sounds.
- Whether the device loses power physically, such as a light going out.
- The cable, port and hub used and what else is connected.
Try in this order
0 of 4 completedCapture the exact symptom
ReversibleNote whether the physical device loses power and which Device Manager entry disappears.
Run the smallest isolation test
ReversibleConnect it directly with a known-good cable, remove other high-power USB devices and test another port.
Correct only the proven cause
ReversibleReplace the failed cable/hub or update the device/chipset driver from the manufacturer.
Verify before changing anything else
ReversibleTransfer data or run the device for ten minutes without a reconnect event.
Stop boundary
When this stops being a self-service repair
- !Replace the failed cable or hub before reinstalling drivers, and change one component at a time so you know what fixed it.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my USB device keep making the connect and disconnect sound?+
The connection is being broken and re-established, most often by a cable, a port that cannot supply enough power, a hub or a power-saving setting.
Why does a USB device keep reconnecting?+
A bad cable, port, hub or power management setting.
Could power saving be the cause?+
Turn off USB selective suspend.
Is the device faulty?+
Test on another computer.