TrackPad won't turn on after batteries were changed.

And that indicates the batteries are ill-fitting. They are either of low grade manufacture from dime a dozen stores or the contact points are weakening.

With the former, they may not be the exact AA size.

With the latter being the case, go for an exchange if within warranty or pack the points with a folded piece of tin foil.

I was having the same issues; received a message on the computer that my trackpad batteries are low. So I put in two new Energizer 1.5v AA batteries. This is the same exact brand as what came in the trackpad, however those that came in it say "Advanced" and what I was using do not. When I pushed the on/off button, I got a split second green light (which I know it does not stay lit constantly) and a window came up on the computer saying it was trying to find the device...to no success even after removing an re-installing the batteries multiple times. I finally put the old batteries back in a viola....it is working. But what a PIA this will be if it won't recognize other batteries. Because it worked after I put those original batteries back in only leads me to believe I am going to have to use the exact same ones in replacement. ??

after all else fails:

take battery cap off trackpad

delete trackpad in preferences

turn off bluetooth

replace battery cap

turn on bluetooth

turn on trackpad

add trackpad back in preferences

reconnect

worked for me after nothing else would

I have the same problem. I can't turn it on anymore and it is only been used on my desk. 😟

I contacted Apple Care Support and said that i don't was the only person with this problem as you can see on this thread for example. He said that they have not recieved enough complaints to call some off the products back. He would not give me a new because it is 2 years and just 2 months old. I dont think this can be okay, when you buy so expensive stuff from the company Apple.

So folks!! Contact Apple Care Support and tell about your problem. Maybe we all can get new when they know about everybody with the problem, like the iPhone 5 battery or the chargers.

Had the same problem.

8 months old trackpad, used by regularly basis, wouldnt suddently turn on any longer...

Tried various kinds of working batteries, popped the spring with chopstick, hit it (softly) different places and stuffed it with aluminium foils. Nothing worked...

Tooked a break, made some coffee and tried all the above solutions one more time - this with succes. It was the foil-trick which did the magic.

So, if you dont have succes 1., 2., or 3. third, then just keep on trying 🙂

Thanks for your solutions!!

Give this a try. Many years ago my HP calculator would not work. An HP tech gave me some counter-intuitive advice. 1. Remove the batteries 2. Reverse the polarity of the batteries. (You heard right. In the Mac mouse place the positive + end on both the batteries at the bottom in the slot.) 3. Turn the unit on. 4. After about a minute take out the batteries and put them back in the correct way.

I tried this with my misbehaving Mac Mouse, and it worked like a charm. Don't ask me why. But that HP tech's advice still holds true.

Good luck.

This happens every time the batteries get changed and it is dumb!

DO NOT go to trackpad in SETTINGS.

GO TO "Bluetooth, click bluetooth "off" then "on" and highlight the darn thing which will not pair and hey presto it does!

I kept forgetting this but have made a Stickie...

After all else had failed, I tried this suggestion, with incredulity mind you; but it worked.

Apple, take heed, there is something that is wrong with the firmware on these units. Mine is a A1339. The batteries were out for about 10 months. Tried three pairs of fresh batteries, nothing, it would not turn on (so pairing was not the issue here). But reversing the polarity, holding power for 3 seconds, returning the batteries to their "correct" polarity and a push of the button later, we had a green "on" light.

So, BishopBullwinkle... thank you, saved me 80 bucks. 🙂

I wanted to throw my experience in here as well. I haven't used my trackpad in ages, and wanted to turn it on. There were no batteries in it, I first put rechargeables in, then fresh alkalines. Neither worked. After reading some of the responses here, I cleaned the screw-end contacts with 99% rubbing alcohol. It looked like there was some battery acid buildup. After working it, I put the alkalines back in and the trackpad powered up. It has warned me that the power is low, but I'll see if that lasts.

can you guys have access to another mac to try it on, just to see if the problem follows the pad?

do you have any other blutooth devices on?

I have the same problem after a new battery and it won't recognize. ...Is there really no one on here who has the answer!?!?!

The light does not stay lit because it is NOT SUPPOSED TO DO THAT.

Helps to read the manual first....

I just shake it a little and it is connected. 🙂