Unplug it of course. leave it unplugged for 5 minutes then plug it back in. You should now be able to turn it on and off normally. If not, just unplug it when you don't need it, or just leave it switched on.
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Compnet Ventures, LLC hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.