USB Ports All shut-down & restart intermittently. Worst with cold PC; Less after PC warm-up. USB port does not work anymore with imaging devices - flat bed scanner, digital camera. Used to work with scanner; now only works with data files read & write. Suspect USB Bridge hardware circuit board. Where to buy / how to replace?
SOURCE: USB ports not working Acer Aspire laptop
Two solutions would be to either restore your pc to before the problem started,using system restore on accesories menu, or use the recovery cd or the recovery folder Acer laptops usually have on the 'D' drive and re-install usb controllers and drivers.
SOURCE: usb ports don't work
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.
SOURCE: Compaq Presario v2000 w/ dead USB ports
I have the same problem with my Compaq Presario V2000. Lost both USB ports and HP tells me that the motherboard has to be replaced at $300 +..I searched and found a PCMCIA card with two USB ports for $10. No problems with the USB ports on this card..great and cheap solution.
My belief is that the compaq usb ports do not have power limiting circuitry therefore allowing you to overload the output power on the ports. My ports failed after I downloaded into a burglar alarm system I was programming.
SOURCE: acer notebook usb not recognized
Sounds like a hardware issue. I would guess that there is a bad connection between the usb's and the motherboard. If you are comfortable dismanteling the laptop and re-soldering the usb's than give that a try, but I would recomend you give it to a pro.
Here is a link that explains the process.
http://www.insidemylaptop.com/taking-apart-acer-aspire-5100-laptop/
SOURCE: DELL LATITUDE D600 USB PORT NOT WORKING
Hi,
You can solve this issue by installing usb 2.0 driver in your DELL LATITUDE D600 laptop find Blow Drivers Download Link:
.DELL LATITUDE D600 Drivers Download Link
Follow the steps given below to refresh USB ports.
1. Right-click My Computer icon on the desktop, and then select Properties.
2. Click the Hardware tab.
3. Click the Device Manager button.
4. Click the plus (+) sign to the left of Universal Serial Bus controllers.
5. Right-click the device listed under Universal Serial Bus controller and select Uninstall.
6. Click OK to confirm the removal of the device.
Please note, repeat Steps 5 and 6 until all the devices under Universal Serial Bus Controller are removed.
7. Shut down the computer.
CAUTION: Ensure that the Shut Down option is selected, instead of the Restart option.
8. Wait for 5 seconds and then restart the computer. When the computer restarts, a "Windows has detected new or added hardware" message window will open.
The above steps will refresh the USB ports.
Now connect the USB devices like mouse, video camera, your external usb hard disk...usb hubs...whatever you like and the drivers should install automatically.
Tip: It is always recommended to connect the main usb devices at the rear end usb port, as they require more power to initiate.
I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309
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PC = Toshiba Satellite L305 series w / Vista H.P.
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