wings2804

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May 27, 2010
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Hello,
i had a problem on my USB, which can not recognized everything i plug in. i already done everything from taking out the battery of laptop and anything that is possible to solve the problem, but all in vain... please help me what to do... my unit is a LAPTOP HP MODEL DV5020US... with many thanks to everyone...
 
A first helpful step...
A. first shut off the USB power saver function:
click my computer, on your desktop

click control panel, it's on the left hand side of my computer window
click the "system" icon, a window will open that says system properties
click the hardware tab
click the device manager bar
when the device manager window opens, scroll down, find universal serial bus controllers
double click universal serial bus controllers, it's on this list
now you will see a list, find USB root hub on the list
double click the first USB hub on the list
when the USB hub properties window opens, click the power management tab at the top of the window
now you will see a box that says: "allow computer to turn off this device to save power"
Un-check that box, click OK
Now double click the second USB hub on the USB Hub Properties list, click the power management tab, un-check the power saver box just as above and click OK
Now repeat that same procedure for all the other USB hubs on the list, un-check the power saver box in each USB hub, until you have done all the USB hubs on the list. There may be several, you must do each, one at a time.
Now close all your windows and restart the computer.
The computer is turning off the USB to save power. It's a bug in XP.
A second helpful step, go into the bios setup and enable Plug and Play, if available.
 


A third helpful step, go to the HP website, look up any updates for your computer.
A fourth helpful step, re install software for the device you are trying to use, while the device is plugged into the USB port.