I have an emachines T2682 (about 6 years old) that was having a problem recognizing the mouse after my dog destroyed it and I got a new one, then the power supply went out, so I replaced it (today). Now, the computer powers up just fine and the lights will come on the keyboard but it will not work. I have plugged in 3 different keyboards usb & regular and a USB mouse and the pointer just sits in the middle of the screen.
I asked someone else and he suggested powering off, unplugging the keyboard/mouse and then plugging the mouse back in after it was restarted. It did not work.
I tried the original keyboard on a working computer (the one I'm on, which is also an emachines)...and it will not work. So I tried a keyboard that I know will work and it will light up, but not work. The mouse (USB) will power on, but the pointer still stays in the middle of the screen. So, I restarted again to try the keyboard and now it won't even light up, but will still work on the computer I'm currently using.
I have also tried to use a USB adapter on the keyboard too. I have tried a regular mouse and used USB adapter to no avail.