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USBs have all become unknown devices on Lenovo Laptop

Last response: in Laptops & Notebooks
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July 23, 2013 8:53:37 PM

Hi,
So randomly today all my usbs became unresponsive on my Lenovo y460p. The left 2 do nothing, the right 2 supply power but do not transfer any data. I have two unknown devices in my device manager, and they randomly connect and disconnect, but always go back to unresponsive.

So far I have uninstalled all the usb devices and reinstalled, updated bios and chipset, I used the microsoft usb repair utility, and followed the infcache.1 guide.

I really have no other ideas.

Thanks
a b D Laptop
July 24, 2013 9:24:52 AM

Take a look at the USB ports. Do any of them look like they're missing any plastics, or have pins out of place?

This pic shows a good and a bad USB port:
http://forums.lenovo.com/t5/image/serverpage/image-id/6...

This could cause all the problems you've described. With your computer OFF you can bend the pins on the broken USB so they are not touching each other or the metal sides of the port, and it *should* restore functionality to the other ports. The cheap solution is to hot glue the bad port to keep it from getting buggered up again.

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July 24, 2013 10:43:33 AM

I checked them out with a flashlight. There was a little dust, but they all looked fine. I cleaned them out, still not luck
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a b D Laptop
July 24, 2013 11:20:02 AM

Great, that rules out a physical connection. Follow the steps on the lenovo site for troubleshooting. Let us know if a specific step solves your issue.

http://support.lenovo.com/en_US/diagnose-and-fix/diagno...
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July 24, 2013 11:45:13 AM

Ok, so I:
-ran the motherboard diagnostic tool from there, said it passed.
-lenovo's y460p user guide had no information on usb troubleshooting (I followed the guide for thinkpad next)
-checked bios for usb functionality, it was enabled

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July 24, 2013 12:17:03 PM

I also just realized that my bluetooth functionality is completely gone as well, the device doesn't even show up. Could there be a relation?
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a b D Laptop
July 24, 2013 1:44:10 PM

Bforcer said:
I also just realized that my bluetooth functionality is completely gone as well, the device doesn't even show up. Could there be a relation?


Yes. The bluetooth is usually connected internally via USB. What ever is fouling up the USB ports is also effecting the bluetooth.

If your under warranty, contacting Lenovo would be your best bet. If your out of warranty, well, you may be looking at replacing the Motherboard in a worst case scenario.
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July 24, 2013 2:15:06 PM

I am out of warranty, so it would appear I'm beat and will have to replace the motherboard. I've done tons of research, and nothing has worked, it must just be malfunctioning hardware.

Thanks for your help.
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a b D Laptop
July 25, 2013 10:51:51 AM

Motherboard repair may be an option as well. I've had good luck with repair services I've found on ebay, just depends on the value of the laptop on whether or not it's worth fixing. If you search your model number and motherboard, your likely to find replacements or repair options.

Good Luck!
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