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If your USB Keyboard stopped working, you can try to disconnect it and connect it back on the fly. USB connections are plug and play, so if you are running Windows and your USB keyboard doesn?t work, you can try unplugging and plugging it back to re-establish the communication, or simply try connecting it to another USB port. If this still doesn?t work, check the led lights on the keyboard; are any of them on? If they are, is the computer acting slowly? You may need to restart it at this point to refresh your computer memory and resources to get it back to normal speed, or perhaps it needs maintenance by running disk cleanup and defrag it
first of all, make sure that your tablet has an On the go USB port or data port if not, it can only be used to charge. If you connect our tablet to a computer usb port, and your computer recognises it, then you have a data port.
If you plug in a usb memory stick, and your computer can not read it, it does not have a USB to go port.
Also, some Cable adapters are On the Go wired, and may not work properly.
It may also be that the USB port is not providing enough power from the tablet to the keyboard. In that case, buy a split power usb cable, and plug the red (power only) into a usb charger or powered usb hub.
The biggest problem with tablets and phones is the micro USB socket. They are easy to break if you put them in the wrong way round and it is not always easy to see if they are connected correctly.
Check the USB plug and the the tablets socket are not damaged.
Check that USB keyboard works in another device and that another USB input device works in the tablets USB socket.
I am suprised it works at all. You state you are using Android 2.2 yet USB hostmode was only introduced with Android 3.1
There are some apps in the play store like USB device info which may help. For proper debugging you need an APK which is not for the average user. http://visualgdb.com/tutorials/android/usbdebug/
But cables and plugs are 98% of the problem
I am not saying this is the correct solution for this problem, but it works for me every time.
First shut down the computer and unplug the power cord for about 5 minutes. Then boot up the computer again with the USB device plugged in. If this does not work, plug the USB device into one of the back ports of the computer case. By the way, have you installed the driver for the device? Hope this can help you.
I insert my
Red bridge multi in one memory card reader and a 2gb M2 card(with data) in the right slot yet I receive a please insert disc?? when I click the removeable (H)of Red bridge(which is detected by my pc)