An Acer Aspire 5 A515 whose USB ports stop working, charge but do not read a device or work only some of the time has a problem that is almost always in Windows or the device, not the ports themselves. This is a value-tier Windows 11 laptop, available with Intel processors from the Core i3-1115G4 up to the i5-12450H or AMD Ryzen chips, and it usually has USB-A ports, an HDMI port and a USB-C port. Because the Intel and AMD versions differ, the exact model number matters for drivers, but the checks are the same.
The checks in more detail
Start by finding out how wide the problem is. Try the device in every port, and try another device, such as a mouse, in the same port; if one port works and another does not, the fault is local, and if no port works, the cause is the system. Test the device on another computer to rule it out, and try a different cable, since a worn cable is a common cause. A device that charges but is not seen may need a data cable, since some cables carry power only.
Next, restart the computer with all USB devices unplugged, which resets the controllers, then plug them back one at a time. Open Device Manager, expand Universal Serial Bus controllers, and look for a device with a warning mark or an Unknown USB Device entry; right-click the USB root hubs and the host controller and choose to uninstall, then restart so Windows reinstalls them. In Settings, Power, check that USB selective suspend is not putting ports to sleep: in the advanced power plan settings, set USB selective suspend to disabled.
Install Windows Updates and the latest chipset and USB drivers from Acer's support page for your exact model, or through Acer Care Center. If ports still fail after drivers and a power reset, shut down, unplug the charger and hold the power key for 30 seconds to drain the board, then restart. Check for debris in the ports with a flashlight, and look for a bent contact. If one port is physically loose or dead, it can be repaired under Acer's warranty. Quote the full model number and describe which ports fail.
Differential
Likely causes of “Acer Aspire 5 A515 family USB or Thunderbolt device is not recognized”, and how to tell them apart
- 1
A bad cable or device
What separates it Only one device fails everywhere
How to confirm Test the device on another computer and use another cable
- 2
A power-only cable
What separates it The device charges but is not recognized
How to confirm Use a data cable
- 3
USB controllers confused by a glitch
What separates it No port works or devices are intermittent
How to confirm Restart and reinstall the USB controllers
- 4
USB selective suspend
What separates it Ports sleep and devices drop
How to confirm Disable it in the power plan
- 5
Outdated or missing drivers
What separates it Devices show an unknown USB error
How to confirm Update Windows and the chipset drivers
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which ports fail and which devices
- Whether the device works on another computer
- The exact Aspire 5 model number
- Whether the problem began after an update
Try in this order
0 of 6 completedTest each port and device
ReversibleFind how wide it is.
Try another cable
ReversibleData, not power only.
Restart with devices out
ReversiblePlug in one by one.
Reinstall USB controllers
ReversibleIn Device Manager.
Disable selective suspend
ReversibleIn the power plan.
Update drivers
ReversibleFrom Acer's support page.
Model-specific
What is true of this model and not of its siblings
- The Aspire 5
- A value laptop with USB-A, HDMI and USB-C ports.
- Local or system
- One bad port is hardware; all bad is usually software.
- Cables
- A cable can power a device without carrying data.
- Drivers
- Chipset and USB drivers matter.
- A power reset
- Hold the power key with the charger out.
- Acer help
- Quote the full model number.
Stop boundary
When this stops being a self-service repair
- !Do not force a plug into a port
- !Unplug the charger before a power reset
- !Contact Acer if a port is loose or dead
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why do my Acer USB ports not work?+
A driver, a power setting or a bad cable.
Do I need a data cable?+
Yes, not every cable carries data.
Will a restart fix it?+
Often.
What is selective suspend?+
A power setting that can put ports to sleep.
Are the ports repairable?+
Yes, under warranty.
How do I find the model number?+
On the label under the laptop.