Trackpad jumps like crazy. Impossible to use.
Some months ago the trackpad started to be less responsive. With the time, the problem got worse. Now, it is completely wild, it jumps around and clicks everything without touching it. Trying to control it is just impossible. I have to use it with an external mouse connected all the time.
I have tried almost everything:
The battery is not the problem as the hardware test shows it is ok and it is not bulging, totally plain.
I replaced the trackpad for another one. Nothing went better.
I also reinstalled Lion and reset the complete system after saving all my data and apps into an external disc.
Thanks in advance.
P.S: I upgraded the RAM from 2GB to 4GB. The memories were the original ones from a MacBook Pro.
Is this a good question?