Keyboard problem - MacBook pro

I have a MacBook pro that I'm having keyboard problems with. The "o,l,return key, right shift key and sound keys" do not work. This happened all of a sudden. Can anyone please help?

Thank you. This is my first time posting to a forum. I'm trying to myself a trip to the App,e store.

First lets start with the obvious question did any moisture get spilled on/into the keyboard?

Slydude said:

First lets start with the obvious question did any moisture get spilled on/into the keyboard?

Click to expand...

No water, but I did clean out the keyboard with air spray.

You've probably "moved" some dirt around that is affecting the keys in question. Just to check, borrow a USB keyboard (any USB keyboard) from someone, plug it in and see if everything (other than the option/windows keys, which will be reversed) works normally.

If so, further cleaning may fix the issue, but I'd be very careful about it -- instead of an air spray, maybe try a small vacuum extension (the kind that are meant to pick up very small items!!) and see if that doesn't help.