Start by working out whether one port, every port or only one device has stopped working. One dead port with the others fine usually means dirt, a loose socket or physical damage. Every port dead at once points to a driver, power-management or controller fault. One device failing everywhere means the cable or the device is the problem, not the computer.
That single question saves a lot of wasted effort. People often reinstall Windows over a snapped USB socket, or open a laptop to fix what was really a power-saving setting. Work through the checks below in order, from the free software fixes to the hardware ones.
Is it one port, every port or one device?
Plug the same pen drive or mouse into each port, then plug the troublesome device into another computer. The pattern you see sorts the fault into a category.
| Pattern | Probable cause | What to try |
|---|---|---|
| One device fails everywhere, including on another PC | The device or its cable | Try another cable, or a powered port |
| Device works on another PC but fails in every port on yours | Driver, power setting or controller | Software fixes below |
| One port dead, the rest fine | Lint, bent contacts, loose socket or cracked solder | Inspect the port, then repair |
| Ports work after boot, then drop out or fail after sleep | USB selective suspend, chipset driver or power-management | Disable power saving, update drivers |
| Desktop front ports dead, rear ports fine | Front-panel cable or motherboard header | Reseat the internal cable |
| Message says "device not recognised" or Code 43 | Power shortage, bad cable or failing device or port | Different cable, powered hub, other port |
Which software fixes are safe to try first?
These cost nothing and don't touch your files. Do them in this order, and test the port after each one so you know what worked.
- Restart, don't shut down. Windows Fast Startup keeps parts of the previous session alive, so a plain shutdown may not reset a stuck controller. Use Restart, or hold Shift while clicking Shut down.
- Unplug everything, restart, then add devices back one at a time. An overloaded hub or a shorted device can disable a whole group of ports.
- Reset the controllers. In Device Manager, expand Universal Serial Bus controllers, look for yellow warning icons, and uninstall the USB Root Hub and host controller entries. Windows reinstalls them on restart. If your only keyboard and mouse are USB, keep a spare Bluetooth or PS/2 one handy in case input pauses.
- Turn off power saving. In Power Options, choose Change plan settings, then Advanced, USB settings, and set USB selective suspend to Disabled. Also open each USB Root Hub's properties in Device Manager, go to Power Management and untick "Allow the computer to turn off this device to save power".
- Update chipset and USB drivers from the laptop or motherboard maker's support page for your exact model. Avoid "driver updater" programs, which often install the wrong files.
- Check the firmware settings. Make sure USB ports are enabled and that settings such as XHCI hand-off or legacy USB support haven't been changed. Restoring defaults sometimes helps.
- Roll back a recent driver or update if the trouble began right after one.
If ports work in the firmware screen but not in Windows, the hardware is fine and the cause is software or power settings. That's good news, and the steps above should cover it. Our guide to laptop USB ports not working has more laptop-specific detail.
How do you check the port, the cable and the device by hand?
Many "dead port" complaints are physical, and you can check most of them in a couple of minutes.
- Swap the cable first. Many cables are charge-only or broken inside, and they fail far more often than ports do.
- Compare low-power and high-power devices. A mouse or pen drive may run happily on a port that can't power an external hard drive. A USB 2.0 port is specified to supply up to 500 mA, and USB 3.x ports around 900 mA, so a bus-powered drive can fail on a weak port. A powered hub solves that.
- Look inside with a torch. Lint compacts at the back of the socket, and USB-A ports have a centre tongue that can bend or snap. With the computer fully off, clear lint gently with a wooden toothpick. Never use metal pins, and never spray liquids.
- Test for wobble. If the port moves in the casing, or the device cuts out when touched, the solder joints are cracking. Stop using that port.
- Take warnings seriously. A "USB over-current" or similar warning at startup suggests a short in the port or the device. Unplug it and don't keep trying.
Why do desktop USB problems behave differently?
Desktops split their ports across two places. Rear ports are soldered to the motherboard. Front ports connect through an internal cable to a header on the motherboard, with separate headers for USB 2.0, USB 3.0 and USB-C. If only the front ports fail, switch off, open the case and reseat that cable at both ends. Bent header pins are a common culprit.
Ports also share controllers, so one failing hub or device can drag down a neighbouring group. A tired power supply can cause random disconnections, and electrical spikes during monsoon storms can damage a group of ports at once. A powered surge protector or UPS helps; see our guide to surge protection and UPS options in Mumbai. If the board's own ports are damaged, a PCIe USB card is a quick workaround while you decide on a repair.
When is it a repair, and what does it involve?
If the port is physically loose, bent, burnt or dead after all the checks, it needs hardware work. What that involves depends on how the port is fitted.
On many laptops, the USB ports sit on a small separate board joined to the motherboard by a ribbon, and swapping that board is quicker than repairing a port soldered to the main board. Soldered ports need micro-soldering skill. We can't quote a fixed figure for either without opening the machine, because the part and labour differ by model. Inspection costs ₹350, refunded if you go ahead, and you get a written quote and a 90-day warranty on the repair. See the laptop USB port repair and desktop USB port repair pages, and for Apple machines the MacBook USB-C port repair page.
Two habits shorten a port's life. Don't wiggle or force a plug, and don't leave heavy adapters hanging from a laptop port. USB-C and Thunderbolt ports have different capabilities, which our guide to USB4, Thunderbolt and USB-C explains.
Frequently asked questions
Why do my USB ports work in the BIOS but not in Windows?
That shows the hardware is alive. The cause is likely a driver, a power-management setting or a Windows update. Work through the software fixes, especially the USB selective suspend setting and the controller reset.
Why do the ports stop working after sleep?
Windows may be powering the controller down and failing to wake it. Disable USB selective suspend, untick the power-saving option on each USB Root Hub, and update the chipset driver.
Can a USB hub fix dead ports?
A hub adds sockets, but it depends on the port it's plugged into. It works around a dead port, but it doesn't repair a failed controller.
Is a loose USB port dangerous?
It can be. Cracked solder joints can short or run hot. If you notice a burning smell or heat around the port, stop using it and have it inspected.
If you've run through these checks and a port is still dead, we can inspect it and quote in writing. Book a free pickup or look at our pricing page for indicative rates on related work.
