USB still hot but gone cold

April 3, 2010 at 23:02:24
Specs: Windows XP
Hey guys, I'm having some issues with my computer's USB slot. I pulled a USB from the slot without safely ejecting and now it doesn't recognise anything I plug in, though it is still "hot." When I plug in my USB dock for example, the power still lights it up but doesn't register that it's plugged in. When I go to device manager and check how many ports are available it says I have two, when in fact I have three.

Things I have tried: disabling and enabling all the hubs and restarting, uninstalling all the hubs and restarting, disconnecting the battery and leaving the laptop for 15 minutes so there's no power supply to the hubs, placing the USB stick that caused the problem back in there to see if it would register that (the theory being that I could safely eject and it would all be fine), scanning for new hardware and also checking for new drivers for individual hubs - but windows search couldn't find the drivers?

Can anyone else please offer me some advice? I did read some talk about a "BIOS" and updating chipsets but I have no idea what that's all about.

I have an Acer Aspire One with Windows XP Home installed - Service Pack 3. Processor is X86 Family 6 Model 28 Stepping 10 Genuineintel ~ 1662 Mhz. BIOS Version/Date - Acer V1.08, 12/5/2009, SMBIOS Version 2.6

Hope someone can help. Any advice would be helpful as I'm completely out of my depth now.

Cheers,
Ryan


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#1
April 4, 2010 at 13:48:16
Complete power off with the battery and AC out and then press the power button a few times. I don't think that will fix it but it is worth a try.

What I'd do next is use a live cd like linux mint 8, boot to the cd and see if that OS works. If both fail then it would most likely be some hardware problem.

Might look in the connector to see if some damage or debris is the problem too.

Might look at bios settings also just incase it says some unique issue like front usb or what.

Playing to the angels
Les Paul (1915-2009)


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#2
April 4, 2010 at 14:48:13
"When I go to device manager and check how many ports are available it says I have two, when in fact I have three."

There may nothing wrong there.

If you're looking in the right place - in the USB root hubs, click on the Power tab - it says ports available, not total ports - the two aren't necessarily the same number. I've found some USB devices use a port and subtract a port from the total available, but don't show anything drawing current for that port - e.g. in my case on a friend's computer, a memory card reader, when there are no memory cards plugged into it.

Plug something directly into the subject built in USB port other than the USB flash drive, such as a mouse - if that device shows up as using current in the USB root hubs, click on the Power tab - then there's nothing wrong with that USB port. You may need to click on Refresh there.
........

You probably just need to use a program to fix the data damage caused by you unplugging the drive without clicking on Safely Remove Hardware and STOPing it.

USB device problems including for flash drives, external drives, memory cards.
See Response 1:
http://www.computing.net/answers/ha...


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#3
April 10, 2010 at 18:54:03
Both good answers, thanks for your time guys. Firstly, I took it down to the computer mechanic to check for physical damage - he told me one of the clips is out of place but he looked hesitant to check it actually was physical damage i.e. ripping it apart, and he knew that's where the conversation was heading!

@Tubesandwires - I can't see the page you're talking about. I'm in the device manager and even clicking on the properties of one of the USB hubs doesn't show me a power tab but I'd love to see this myself.

@jeffro can you please explain how to check BIOS settings and what I'd be looking for in there?

Thanks a lot guys - I know there must be other things you'd rather be doing with your Sunday!


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Related Solutions

#4
April 10, 2010 at 20:18:44
In Device Manager, open up the USB controllers folder by clicking once on the + before it, double click on any USB Root Hub, the tab for Power is at the top of the window that opens.
........

"I have an Acer Aspire One with Windows XP Home installed ..."

Apparently that's a Netbook, but Aspire One is not the complete model.

It's Acer Aspire One AOxxxx

FAQ
Locating the Model Number
http://netbooks-us.custhelp.com/app...

Where is the model number located on a netbook?

The model number is located on the bottom of the netbook on a white label above the serial number.

Alternatively, the model number will be located in the BIOS which can be entered by pressing the F2 key when turning the netbook on. Once in the BIOS, it will be under the Information tab to the right of Product Name.
........

My notes -

"....how to check BIOS settings and what I'd be looking for in there?"

"...the BIOS which can be entered by pressing the F2 key when turning the netbook on."

The USB controllers entry of some sort will be somewhere in there - it must be enabled. Some bioses have a separate entry for enabling USB 2.0 support of some sort, but that would NOT cause no devices to be recognized when plugged into a USB port.
.............

FAQ
USB Ports Not Working
http://netbooks-us.custhelp.com/app...


How should USB drivers be reinstalled for ports that are not working?

To remove and reinstall USB drivers, follow the procedure below.

1. Remove any USB devices that may be attached to the system.
2. Go to Device Manager, as follows:
Click on Start, Control Panel, System, Hardware tab, and click on Device Manager
3. Click the + next to "Universal Serial Bus Controller"
4. Double click on the item(s) listed then choose uninstall. When prompted with "Are sure you want to remove," click Yes.
5. After all items are removed, close all open windows and restart the system.
When the system reboots, it will reinstall the USB drivers.

If the USB ports still do not operate, the unit may need service.
...........

My notes - starting at the bottom of the list of devices there, RIGHT click on each one and choose Un-install.

If the USB ports still do not operate.....
- have you dropped the netbook, or physically jarred the netbook, or have you spillled liquid on the netbook, since the USB ports last worked properly ?


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