A previously installed device is not currently connected to your PC.
The old USB device will appear in the hidden devices list.
Distinguish whether it is an actual connected device or a previous record.
If it is checked and resolved from above, you do not need to proceed to the next step.
The old USB device will appear in the hidden devices list.
Difficulty Easy · Estimated time 5 minutes
Check points: Record the error code, when it occurred, and any recent changes.
A previously installed device is not currently connected to your PC.
Difficulty Moderate · Estimated time 10~30 minutes
Check points: After connecting, check if the Current Device item appears.
When troubleshooting USB devices not being recognized, it's important to rule out the causes one at a time. Based on the “USB not recognized” symptom, check the port/cable problem and USB driver, then proceed to the next step. Cross-test devices, cables, and USB ports and check for power management and driver issues.
If you are experiencing the “screen suddenly goes black” symptoms, possible causes include a graphics driver crash or display output change. First check if Windows is running, then check the output mode and graphics driver in that order.
Content review date: 2026-10-07