New batteries, the unit is only a couple months old, mouse connects and works fine.
Instructions say to hold in connect button on mouse for 2 second to turn on(this works), then it says to press connect on receiver, then quickly press connect on mouse(mouse connects and works). The actual instructions don't mention connecting the keyboard. But if you look on the bottom of the keyboard, it shows you to turn the mouse on, oress connect on receiver then mouse, then connect again on receiverthen on keyboard. I do this and it seems like it is searching for the keyboard as the lights flash and everything, but the keyboard doesn't connect. I can press the F mode key and it will toggle the F mode light on and off on the receiver. But the keyboard will not work.
Instructions also say if the computer has a PS2 port to use it for the mouse and the adaptor for the keyboard, if it is USB only, then just use USB. I have tried all combonations of this. I don't recall how it was set up before.