Could be a problem with the Hard Drive or the Hard drives PCB
http://www.onepcbsolution.com/Hope this helps.
w7
First, please disconnect all USB devices and then perform the following steps:
Click "Start" button, type "devmgmt.msc" (without quotation marks) in the "Search" bar and press "Enter". Click "Continue" if necessary.
In Device Manager, double click to expand "Universal Serial Bus controllers", right click on the Host Controller, click "Uninstall" and click "OK".
Repeat the step 2 to uninstall all items under "Universal Serial Bus controllers".
Then, restart your computer and Windows 7 will reinstall all USB controllers automatically.
for xp
click start control panel administrative tools computer management device manager scroll down universal serial bus controllers you could see a yellow question / exclamation mark? ! or a red X
you will need to update/reinstall drivers
right click to reinstall drivers
if you can see your usb but its not working
ports(com&lpt)right click update driver
sometimes the wires inside the cable will be damaged due to bending or stretching or placing heavy equipment upon the cable
just replace the cable of the hard disk, when you plugged the external disk drive you got that windows could recognize the USB device change the cable everything should work fine again,
if you can see your usb drive but its not working
ports (com&lpt) right click update driver if this fails to fix the problem
check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems to a computer and its parts
if this fails to fix the problem there might not be enough usb power for it to be recognised
you might have to install a usb 3 card they are cheap and easy to install you can buy these on Ebay very cheap
$10.65 free postage
You might get these on Ebay im not sure which country you are in this might guide you to one you could get this on Ebay if you dont have an account you will need to create one https://scgi.ebay.com/ws/eBayISAPI.dll?RegisterEnterInfo Add Email adress Add Bank Acc Add Credit Card also add your postal adress also add a paypal account when you get to the paypal login page at the bottom you will see new to paypal sign up tab paypal to create an account paypal registration password ,bank card /credit card,phone numbers home/mobile ,email adress and a postal adress http://www.paypal.com/ be very specific when you type in the search always ask questions? before you make a purchase and keep the email/s for security reasons if the item arrives and its not as described you will even see the pictures of your item so you cant make a mistake and get them home delivered also Downloads to Recover Your Files and Save Your Bacon and 10 Best Free Hard Drive Utilities.
Some addition links found on Googlehttp://www.datarecoveryreview.net/
http://www.easeus.com/resource/hard-disk-data-recovery.htm
hope this helps
Support IDE/SATA/USB Hard Drives memory cards USB Memory Drives Windows Password Cleaner Available in Live CD to run offline This is a utility to blank the password of any user that has a valid local account on your Windows system. You do not need to know the old password to blank the password. hope this helps
http://download.cnet.com/drivers-for-free/3000-18512_4-75548155.html
Windows XP/2003/Vista/Server 2008/7/8 free drivers
http://www.downloadcollection.com/device_doctor.htm
Device Doctor is a freeware Windows application that scans your computer hardware and checks to see if there are new driver updates available for your devices. It also locates drivers for Unidentified Devices in the Windows Device Manager. This tool was designed to be very simple and easy to usehope this helps
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