Keyboard keys

[Ant132]

My 'down' key wasnt working properly on the laptop, so i flicked it off and cleaned it, and then the fookin little green rubber bit broke off, but how do i get the key back on

There seems to be 4 little metal pieces on the keyboard and some sort of green plastic square on the key, the laptop is a Samsung R60+. Any paticular way the pop back on?

Cheers, Ant
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1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200