Acer desktop M1100 wont boot up at all

Hello,
I have an acer desktop M1100 and it is not very old but out of warrinty. Some one of the kids put a cmos clearner disk on to it and ever since then it will not work. It powers up and the supply stay on and fans work but if i try to restore it or bot it up it wont start the disk. Its not even sending a signal to the screen its remaining black. What can i do to resolve this issue please help i am my wits end

Thanks