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Why is my trackpad not working properly?

The trackpad on my Macbook suddenly stopped responding properly, when I move my finger the cursor stops intermittently. I found two workarounds that might give some clues:

1) if I apply even just light pressure under the trackpad the cursor moves as it should,

2) it also works if I unplug the power source, ie. in battery mode! (not ideal, since my battery is seriously bad)

Any ideas what might cause this problem?

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Thanks guys! As it happens, the trackpad started working again before I could try any of your suggestions. If I had any less experience with computers I would say this is very strange…

Now I have the problem of USB-Midi not working with the power source attached, but that’s off topic…

par

@mholmqv - I would still look at your battery as this sounds like a classic case of a swollen battery.

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It sounds like you have a double whammy here. If your Battery is going it could be pressing on the trackpad from below, often times the battery swells up. I would test it using CoconutBattery Post a snapshot of the main window here so we can see how it looks Ajout d'images à une question existante. If needed replace it and you still may need to replace the trackpad and its cable if they got damaged. Remplacement du pavé tactile du MacBook Pro 15" Unibody début 2011 which is the same process for your system. And here’s the battery info Remplacement de la batterie du MacBook Pro 15" Unibody mi-2010

Image MacBook Pro 15" Unibody Mid 2010 Batterie

Tutoriel

Remplacement de la batterie du MacBook Pro 15" Unibody mi-2010

Difficulté :

Facile

10 - 45 minutes

Image MacBook Pro 15" Unibody Early 2011 Pavé tactile

Tutoriel

Remplacement du pavé tactile du MacBook Pro 15" Unibody début 2011

Difficulté :

Modérée

45 minutes - 2 hours

Image iFixit

Tutoriel

Ajout d'images à une question existante

Difficulté :

Très facile

2 - 5 minutes

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try SMC and PRAM resets. those solve most software related Mac problems. if SMC and PRAM resets don’t work then you might have to replace the trackpad.

Image MacBook Pro 15" Unibody (Mid 2009-Mid 2012) Trackpad

Produit

MacBook Pro 15" Unibody (Mid 2009-Mid 2012) Trackpad

$59.99

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mats.holmqvist sera éternellement reconnaissant.
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