The BRAND and MODEL of your lap top are painfully missing.
It's very hard to help you without those informations as the wireless controlls tend to change from brand to brand, and even model to model from the same maker...
Can I suggest actualy reading your user manual? If you lost it, you can get in as a PDF file from the maker's web site.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix notebooks/laptop pcs.