Hp laserjet 1020 ( usb device not recognized )!?
I wish that there was a simple, single answer for this. There's only one thing more distressing - no device recognition at all. Here are the most likely culprits:
* The USB device or the USB adapter requires it's own power source. If your USB device or adapter came with an AC power "brick", try connecting it.
* Here's a likely one - the front USB ports on your PC case may be misconnected. I've seen them that way from the factory. It's a good idea to check the connections against specifications. The standard order of connection is Red, White, Green, Black. No more than 4 wires per USB bank are needed.
* Defective device. Do not assume that all PC components work correctly out of the box. I've seen many new USB devices that do not work. If you can, try the device on another PC.
* All drivers are not installed. Some devices will require installing the driver package before plugging in the device. Some devices will also require basic USB files from the Windows CD before the unit will function. The general rule is to always follow installation directions precisely and to have the Windows CD ready.
I will now discuss how to address an unknown device problem which is caused by a driver deficiency.
1. Try to update the unknown device driver from within Device Manager. First try letting Windows search for one. If that fails, go back and choose "Select from a list" and then "Have disk". Browse to the device CD and look for the appropriate Windows folder there. Try browsing to the Windows CD (Win9x folder or i386 folder). Lastly, try updated drivers from the manufacturer's web site.
2. Try uninstalling the unknown device, unplugging the device and rebooting. Replug when back in Windows.
3. Be certain that you have the correct drivers! You may have gotten the wrong CD or a CD with drivers for more than one device on it.
4. Cleaning up in Safe Mode may be necessary. Unplug all USB devices. Reboot the PC. To enter Safe Mode, press the F8 key repeatedly while restarting the PC. Timing is important. Try to press quickly before the Windows logo screen appears. Pressing and holding the CTRL key may work too. Choose Safe Mode and open Device Manager. In Windows 2000 and XP, click View > Show hidden devices. Now locate all USB devices, HID (Human Interface Devices), USB drives and controllers/hubs. Remove all and save the USB Host Controllers for last. When done, restart and replug USB devices one at a time.
Just remember that you are entitled to support from the device maker. If you can't get help, do not hesitate to return the device. Some manufacturers only seem to respond to lost business. It's a shame, but it's true. Send them a message - that you won't accept shoddy goods or lackluster support.
Mar 26, 2008 |
HP Photosmart 3210 Printer