MacBook – Trackpad Locked MacBook Pro

A great way to rule out hardware versus software issue is to create a new user and see if the problem still occurs when logged into the new user.

System Preferences>Accounts> + (may have to unlock first). For ease of use, I'd make the new "test" account an administrator. When you are done, log out and back into your regularly used account. System Preferences>Accounts> - (delete home folder and all contents).

If the issue persists, it should be related to hardware and not software.

Hope that helps!

Your trackpad is definitely dead. It needs a replacement. The dead line means that it is slowly dying. I have had these things. Probably your connector is getting old. But mine got burnt up because the hotel I was staying in did not have proper grounding in their mains supply. This meant that current was flowing from the metal parts and trackpad (it is electrified), through my body, and onto any grounded metal surface I touched. Trackpads are very sensitive to current changes as they have very thin wires running through them. The high ground current burns them off, either row by row or column by column.