"hi , i have a acer 5515 and i cannot get the touchpad to work , it worked sometime ago but now i cannot get it to respond , because of this i changed the os from vista to win 7 but it did not resolve the problem. I already tried Fn + F7 and got no response. can you suggest a way to resolve this issue ?
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is it still in device manager? if not open the unit and see if the ribbon cable it still connected.