Black MacBook works but has strange behavior
I have a 2.4 Ghz black Macbook (4,1) and it generally works fine.
I lent it to a friend for a few months and it came back working fine - at least so I thought at first.
HOWEVER..... it now strange things happen.
The Mac acts like a key is stuck down
For example, programs will beep as though I'm entering a completely wrong key.
When choosing an option on a menu, the Mac will alternate between the various choices on it's own.
TextEdit will give a drop down menu of alternate words while I write. This is a menu with a scroll bar. It is NOT the same menu that you get when control clicking on a word in TextEdit.
Tech Tool 5 shows no problems.
I'm suspicious that the a key (or keys) are stuck down, but am am wondering if there is some other problem.
Can I operate this computer without the top case at all to test my theory?
I also a have a 2.0 ghz white macbook that I could swap onto this computer.
Will that work?