keyboard replacement

My son has just decided that I needed to replace my venerable Cherry (non-mechanical) keyboard, so he spilled a cup of squash over it. So, as well as him now being banned from having drinks any where near the computer, I need a new one. On the plus side, I've been fancying getting a mechanical...

Hi everyone, I dissembled my laptop (NP550P7C-T02CA) to change its keyboard but it looks like the keyboard has been secured with melted plastic, instead of screws. That's the best I can describe it. So I'm not sure if I remove the keyboard and replace it with a new one, how would I secure it...