When speaking with my daughter, she advised all USB ports have stopped working, and the computer running very slow.
While speaking with her, I asked she run Task Manager.
With no programmes running the processor was at 100%, I asked her to enter the BIOS and disable USB, by doing this the processor dropped to 3%.
The time the USB's began to fail is as follows -
One of the ones in the front stopped working about 6 months ago. The other one stopped working about 3 weeks before all the trouble started, (computer running slow). When that one stopped working (other front), we started using one of the back 4 ports. One of the back 4 had the printer connected the other had the mouse which left 2 ports to use. All 4 of these stopped working at the same time about 2 weeks after using them.
In the BIOS the following changes were made - I have turned off 3 USB root hubs. The USB PCI controller is on and 2 standard USB is on. The USB in the BIOS is now enabled and the computer running OK except for no USB ports. I would appreciate some advise. kevsim
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www.tomsguide.com/.../usb-ports-stopped-working-acer-aspire-5750.ht... Apr 23, 2014 - USB ports stopped working Acer Aspire 5750. Tags: Aspire. Laptops... I have an Acer 5750 none of the USB ports work I tried disabling them all ... on Acer Aspire 4935 laptop Forum; Acer Aspire Computer - USB not working ...
If ALL the usb ports have stopped working, this is a problem with the USB controller. The short answer is that you cannot easily repair this. In all probability, the controller, or a circuit trace to it has blown or shorted. You would need to get another motherboard.
If one is still working, then you can get a PCIMCIA card to usb port that will give you 2-4 extra ports, but this will only work if at east one of your existing usb ports is still functioning
So maybe you need to install the drivers for the USB device you are trying to connect. Also, with the computer off, try cleaning all USB ports and plugs. You can buy electrical cleaner in a spray can at Radio Shack. Let it dry thoroughly before powering up. But to me it sounds like a driver problem. Unless maybe your USB BUS is going bad.
I'm assuming you are speaking of the USB ports on the Monitor?
Do you have the USB cable running from the back of your computer to the back of your monitor? For those ports to work, you need a USB cable that runs from the computer to your monitor. This is a cable in addition to the power cable and the video cable. Verify you have three cables connected.
If you are not speaking about the USB ports on the monitor, please advise...
I would go back to device manager and uninstall all drivers in the USB category. Reboot and Windows will re-detect all the USB ports, this should work. If it was an electronic problem then some ports would work and other wouldn't but not all since there is multiple USB controllers in most computers these days.
I think you might have a loose cononection for the data ports. Try putting a little bit of force on the usb device. Up, down left right. NOT ALOT. If it starts working when force is used, i tihnk you should try to take it apart and resolder the connections. If it dosen't work, uninstalling the driver and installing.
You'll want to verify your computer recognizes your usb ports.
In device manager, look to see that you don't have anything with an exclamation mark, question mark, or red X on it. Make sure you have the usb ports listed under Universal Serial Bus controllers. If nothing shows, your usb ports may be dead. Depends on the age of your computer and what might have happened to them.
Device manager- right-click My Computer and go to properties, then select the hardware tab.
Reinstall your USB drivers: Navigate to Device manager, find a branch named "USB Controllers" or similar Right click the one thats the problem (or all of them if you dont know which), select Uninstall Reboot your machine and windows will autodetect the USBs and reinstall their drivers.