MX700 Desktop Set Problem!

I have an MX700 desktop set which i bought from the internet, and after a month it has now stopped working, BUT i know that they are responding to the computer as the reciever is lit up, and i know that the mouse and keyboard are responding to the reciever as when i press the button to connect them, the reciever lights up!

Anyone any ideas to try and fix this myself before i have to send it back! :angst:

Thanks! :)

Have you tried reinstalling the drivers?

Have you tried the reset buttons on the base receiver, mouse and keyboard? You probably need to do them all within 10 seconds.