Question about Computers & Internet
USB hubs operate at 5V DC power, as do a lot of things on your motherboard do. They are able to transmit DC power to a device which makes it possible for items to be plugged straight into a USB port and not have an external power supply.It sounds as though the main connection between the USB points and the power supply has become broken, as a lot of USB points are connected in series to save space. Also, one point on the USB line could have possibly become grounded. A fewer simple measurements with an OHM reader may help in this situation.
Posted on Mar 25, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
click start control panel administration tools computer management device manager look through all of your devices if you see a yellow question mark?or exclamation mark ! or red x
right click to reinstall drivers or
if you can see your usb but its not working
ports(com&lpt)right click update driver
if this fails to fix the problem
check usb leads for secure dust free seating
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,
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
hope this helps
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