My USB-ports seem te do what they want. Sometimes they work for one time and then all the other ports not anymore. I have loaded the USB-ports new, and then also it works once. Reloading Windows works also for one connection. How can help me
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The flash drive itself may be faulty or damaged, and sometimes this is
not apparent from a physical inspection. Try attaching the drive to a
USB port that you know is operational, and try plugging another USB
device into that port to verify that the port is working.
try the other usb ports. sometimes that works. also make sure that your other usb devices are off if possible. If you are using a usb keyboard try using a ps/2 keyboard. If you have an open usb port in the front try using that instead. I have seen this many times. Good luck.
Try the keyboard in the USB port you've been using for your mouse. Just move your mouse to a different USB port. I know, this seems like a "too simple" solution, but USB ports sometime get cranky.
A question I would have would be: have you been using a PS2-type keyboard prior to trying to use the Acer USB one? Sometimes the BIOS needs the item "use USB port for keyboard" turned on.
Step 1 Before you start working on the USB port, make sure that your device is not the problem. If the computer says that the there is a new USB device but that it cannot use it, typically there is a problem with the device's driver and not the USB port. If this is the case, your best option is to re-install or upgrade the device driver. Try inserting the device to another computer. If the device works, most likely the problem is with the computer and not your device.
Step 2 Try rebooting the machine. Rebooting a computer resets all of the software to the default state and will clean up many issues. The start up process also checks all of the devices on the computer and can sometimes fix a USB port. First shut down the machine. Connect the USB device up to the computer and start it. This reboot will sometimes fix a bad USB port.
Step 3 Try attaching the USB device on to another USB port on the same computer. If the device now works, the old USB port probably has a hardware or BIOS issue. Skip to step 5 to try to fix a bad USB port through the BIOS. Fixing a hardware problem on a USB port requires working on the motherboard which is typically more expensive just adding a new USB ports.
Step 4 Uninstall your computer's USB device bus manager. The device manager controls the USB access and sometimes gets corrupted. Fixing the USB device manager requires administrator rights on the machine. The best way to uninstall the device bus manager is to right click on your computer's icon and select properties. This will bring up the hardware settings for your machine. Click on the hardware tab and select the device manager. The device manager lists all of the devices on the computer. The next step is to open up the "Universal bus controller" option. Right click on all of the items under this option and uninstall them. Once all of the devices have been removed, restart the machine with the USB device connected. Upon reboot, windows re-installs the USB device manager. Most of the time, this will fix the USB port.
Step 5 The next thing to try is to check the BIOS. Restart the machine and enter the BIOS setup screen. You should check to make sure all of the USB ports are active. If they are, you should try resetting the BIOS settings to the defaults. The BIOS reset will sometimes fix USB port. But if it does not you will have to consider upgrading the BIOS. Upgrading a computer BIOS is very dependent on the motherboard manufacturer and you will have to visit your computer manufacturer's web site for detailed instructions.
Step 6 The last trick to try to fix a USB port is to repair your OS. Sometimes the USB drivers can get corrupted and break the USB ports. You can reinstall the system files onto the computer which should fix the USB port. Your data files should not be changed in this process, but it is a good idea to do a full backup of the computer ahead of time. In windows, an OS re-install is done by loading up the windows installation CD/DVD and selecting the repair windows installation. Just follow the steps and you often have a fixed USB port at the end of the process.
Maybe the USB cable or the port on the PC or PRINTER is defective. First try a different cable, then try another open USB port to see if it works there. Also, the POWER CORD for the printer may be loose or defective, or maybe one of the printer DOOR INTERLOCKS may be intermittent, or not closed properly.
Try reformatting the drive to factory defaults. I would also try this unit on other PCs to verify that the USB port will not work correctly. Does the USB port on your Sony Walkman MP3 player have any damage or broken pins/connectors on the USB port?
As you have already stated that the port in question can run a standard optical mouse, the port seems to be working fine.
Sometimes the drivers for a USB device need to be installed for each USB port. Maybe you have installed these drivers for 3 of your 4 USB ports, but not for the one in question, result of which is the problem you face.