I have a ASUS A6 series laptop for a few years now and suddenly every time I plugged in a usb device like my mouse my computer doesnt want to start up. You can hear the computer is on but nothing display on the screen. when I unplug the usb device it works without any problems...
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Solution is to re-install USB Root HUB > Make sure you disconnect all USB devices before you follow these directions. Use a PCI mouse and/or Keyboard to do the following. You may try using a USB mouse, but often times you'll uninstall your mouse's USB Root HUB before you completely uninstall all the other USB Root HUBs making your mouse useless. Follow the steps in the link over and over until all USB Root Hubs are uninstalled. Restart your PC and then slowly add one USB device at a time.
Side notes: Keep in mind if you have way too many USB devices you will need a Powered USB HUB. You can buy them cheap, and they are worth it. Often times folks plug more USB devices than their motherboard/power supply can handle or they rotate like 40 devices on one PC. Rotating is OK, but you might want to follow these steps to make sure your PCs USB is working OK.
Does the drive work with other computers? What is on the Drive? File Format? What size? Have you done ALL your Windows and Asus updates? Remove ALL media, DVD,CD,USB, shut down, unplug, remove battery, leave battery out, plug in , reboot, insert USB.
All PCs provides power supply via USB port. The power is controlled by electronic circuit. Sometimes when overloaded the circuit burns out (the last controlling transistor, actually). This does not prevent the data communication, because it is separated circuit. But if the device is not powered it cannot communicate. When you plug the USB device to powered USB hub, then all go right. Are you able to use the USB ports with other USB-powered devices like USB sticks, mouses, cameras? If not, the mentioned circuit is burned out. If they work OK, then your internal USB hub provides less power current than needed. In both cases there is nothing to do. The circuit resides on the mainboard of the laptop and replacement is expencive. Use it with that external USB hub you have.
You can upgrade your motherboard's BIOS with the latest version (downloadable at: http://www.asus.com/product.aspx?P_ID=KyHOsOKWujC2QguJ&content=download). This might help resolve the problem. If not, then the problem you are having might be because of a bug in Windows 7, since it is not yet the final version. If possible, you can test whether this is the case or not by backing up your system & installing Windows XP or Vista, and test to see if the problem will persist or not.
Unplug ALL Usb devices, that includes printers, cameras, pen drives, i.e. anything that plugs into a USB connector. Then try rebooting your computer. I bet your problem will no longer exist, but if it does, then you need to suspect a faulty USB connector on the motherboard or USB chipset located on the motherboard. Once the computer is booting normally without USB devices hooked up, you can start installing ONE Usb device at a time, until you find your defective USB device. The USB device drivers will need to be installed and computer rebooted at least once between the various devices. Not doing so will lead to confusion as to which USB device is causing your high current problem. It is also possible athough a bit unlikely that this procedure will cure your situation for the time being but look out for it in the future because it could be an early sign that one of your USB devices is going bad.