USB devices not even being recognised by laptop?

March 29, 2012 at 10:06:29
Specs: Windows 7, Intel Celeron CPU B800 1.5GHz
Hi, I noticed a few days ago that after being on my laptop for a while that my USB devices that I had (Usually just a USB Mouse) would stop working. Sometimes it would say that it has exceeded the power limit, other times it would give no warning. Now when I plug in any device there is no sign of life... nothing. When I go on device manager it doesn't even show the device, so it's not even like its actually acknowledging that it's there, there's just nothing. I am using Windows 7. Any solutions?

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#1
March 29, 2012 at 10:34:15
Did u try connecting usb device when using only battery?

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#2
March 29, 2012 at 11:08:51
Yes, nothing happens.

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#3
March 29, 2012 at 12:14:42
Take a careful look at your usb ports, is the center plastic part still there or is it broken off?

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Related Solutions

#4
March 29, 2012 at 12:53:00
"exceeded the power limit, "

This is the cause. Either some usb device is going bad, or your hardware inside computer.

Full details would be in event logs. Sort by type of problem like usb.

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#5
March 29, 2012 at 12:59:45
It all looks fine. It just started working again for an hour and has gone back to not working. It was almost like when I knocked it, but I have tried 4 different devices so it's not a broken device and the ports look fine. Its not an old laptop, only a few months old.

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#6
March 29, 2012 at 13:01:41
It all looks fine. It just started working again for an hour and has gone back to not working. It was almost like when I knocked it, but I have tried 4 different devices so it's not a broken device and the ports look fine. Its not an old laptop, only a few months old.

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#7
March 29, 2012 at 14:26:28
Since it is new, it should still be under warranty if only a few months old. I would simply return it.

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#8
March 29, 2012 at 15:36:21
Can you explain this please:

"It was almost like when I knocked it".

If you mean you knocked the flash drive while it was inserted then you have probably damaged the USB socket. If it is shorting then this would cause the power limit message.

Might be able to help further, depending on your answer.

Always pop back and let us know the outcome - thanks


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#9
March 30, 2012 at 01:58:02
When I said about knocking it I meant when it worked for an hour yesterday I went to grab something which moved the laptop as I had it on my legs and then the USB ports stopped working again. It wasn't a hard knock and there never has been, this is why there should be no damage to the ports and there doesn't appear to be any.

A few days ago it went through a period of working for a while then switching off, I would have to restart the laptop for the USB ports to work again. Sometimes when they went off there would be no error message by windows. However sometimes it would say that it has exceeded the power limit. Thank ypu


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#10
March 30, 2012 at 04:45:59
Back up your files and go back/return for warranty replacement. It is too new to be having such a major problem and this is going to get tiring really fast to you. You have a problem one and it will only get worse until your warranty runs out, by then you will be ready to throw it out a window for being annoying. They may try to repair it, but if it takes more than a few hours (or 'pick it up tomorrow'), or if the problem reoccurs later, you should insist on a new one.

You have to be a little bit crazy to keep you from going insane.


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