Acer Aspire?

Acer Aspire I think this might be the model number
5741z the 'K' key has come adrift after dropping a mechanical eraser on the keyboard. No damage showed until cleaning out dirt between the keys with soft brush the 'K' key lifted on the edge facing M key then after trying to press it back down sprung up again completely came off. How do I get this key back on seems like all underside of the key moving parts are still on it but it won't stay in place when pressing down to clip it back.


Any ideas how get it back, or if I have to, a Computer shop would charge for replacing it? (UK).

Not knowing anything about computers is it possible, if it can't be replaced cheaply, I can use a separate key board via USB port. I'm a pensioner and don't want to be 'Screwed' by a shop.

Many thanks.