Mac keyboard malfunctioning

[imaverick]

Hello,

I'm seeing issues with my Mac keyboard.
Sometimes, when I type letters, it prints two different letters. Here are some examples:

If I type letter 'p', keyboard prints it as 'pu'. Similarly If I type letter 'u', keyboard prints it as 'pu'.
If I type '/', keyboard prints it as 'm/'. The problem is there with at least 5 letters.

Sometimes, it prints the intended letter and doesn't print extra letters.

Here is the interesting part. When I tried to print same letter using Mac onscreen keyboard, it prints letters fine.

Can any one advise how to get this resolved? Thanks

 

[Raz0rEdge]

What Mac keyboard? Wired? Wireless? Any liquid damage on it? When did it start? Does it happen with other Macs if you can test it?