Question about Mercury P4VM800M7 Motherboard

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Usb is not working

Some times my system usb have not working

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Please go to devicemanager by right clicking my computer and selecting manage option.
Click on the + sign given before USB root hub and uninstall all the values coming below by right clicking on those.
Restart the machine issue should be resolved.
If any err message is coming (like usb power surge ) then intimate me.

Posted on Feb 17, 2009

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Posted on Jan 02, 2017

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I hope that this has been very helpful for you

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Have you tried a restore to an earlier date, choose a date on which the ports were still active. Click start, click all programs, click accessories, click system tools, click system restore, choose restore my computer to an earlier time, select date. You can also roll back drivers by clicking start, click control panel, click system, click hardware, click devise manager, click on universal serial bus controllers, rt click on your usb port if it is there and choose update driver. Good luck.

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I have an Asus A8N-VM and all of my usb ports quit working over this last weekend. It kept losing the connection and regaining it all day Saturday then it just quit working. Luckily my tower has PS2 ports...

this problem for that i know is caused from this :
one your controller that controlling your usb ports is finished, and with this is coming more problems not oly usb ports,
second you prompted to install something but you didn't. go to control panel system, devices and one time you are there click on your computer name in begining of the list. after that click in action and then scan for new devices, if nothing is found in the list go to universal serial bus controllers and see if is finded there no name usb or unknown usb device. if this isnt helpin you fixing problem try to install again your system but without destroing that you have to not loosing to much time, in setup window dialogue select repair but the secon that appear not first one.

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A usb device may have blown out some of the ports, If you have at least one working usb, get a powered usb hub to get more ports.

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