I have a wireless keyboard/mouse combo from Logitech. I can't remember the model and I tried searching the Logitech site for it and I couldn't find it (it's a few years old). A few days ago my mouse started blinking red (it needs to be charges) so I put it in the charge and it still blinked red. A couple hours later a took it off and it still keeps blinking red. Is it time for a new combo?