Mac Keyboard issue

Thanks, that was a great help.

Then it seems SHIFT+alt keys are stuck or shorted out, holding those 2 keys & typing a s d f g gives me...

Å Í Î Ï ˝

Can you plug in another say USB keyboard?

If not then it's Apple Store time.

If your Apple keyboard doesn't work - Apple Support

Keyboard typing weird letters and symbols

Just wondering if you saw this or could show us a pic of what you're seeing?

What do you get when you type asdfg? If it is åß∂ƒ© that indicates the Alt/option key is somehow always down.