Wireless keyboard won't turn on after changing battery

This is what happened:

I got a message yesterday telling me that the battery for my wireless keyboard was low and I should replace them. This morning, before I switched on my Mac, I put in new battery for the wireless keyboard. Then I switched on my Mac. And I got a message on the screen saying that There's no keyboard connected and couldn't find any keyboards. I thought that maybe I need to turn on the keyboard to make it work. So I pressed the power button and noticed that the green light doesn't even come up..

What's going on? Is my wireless keyboard already dead??

Any advice would be appreciate it. Thanks.

G5, Mac OS X (10.5.2)

Posted on Jun 26, 2008 12:48 PM

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Question marked as Top-ranking reply

Posted on Apr 22, 2009 4:40 PM

Take all Batteries Out.
Roll up a small piece of Tin Foil about the size of a Pea.
Drop the Tin Foil Ball down the Battery Compartment.
Put your Batteries Back In.
You should have a Working Keyboard.
This worked for several people on here including me.
I'm still running 2 months later with my rolled up piece of Tin Foil in my Battery Compartment.
I know it sounds Crazy. That's what I first thought.
Apparently Apple did not make the + Terminal Inside the Keyboard correctly.
Try it. What have you got to lose?
337 replies

Feb 12, 2012 12:32 PM in response to sickamoreartis

Same thing today. Low battery warning on the wireless keyboard (model A1255). Replacing them resulted in a keyboard that would not power on (no green light on power button press). One of the posts indicated it was a bad battery contact on the + terminal (thanks for the clue!). Looking down the tube, there is indeed a plastic ring that the battery rests on. I took a paper clip and created a small spiral of metal and snipped off the remainder. I dropped it down the tube and rattled it around to fall into the hole. Dropped in the fresh batteries and voila... it works. YMMV.


In general Apple stuff is pretty well built. I'm surprised that something so trivial is happening.

MBP, Mac OS X (10.5.5)

Feb 21, 2012 2:13 PM in response to JasonBChen

Hi. I was having the same problem and called Apple Support.

I was certain I'd put the batteries in correctly - I had not. They go in POSITIVE end first.

Then turn on the keyboard. Nothing happened at first. Then the tiny green light in the upper right hand corner started flashing (a way to also test if the keyboard is on is to press CAPS LOCK).

Still, the keyboard did not work. I'd type and nothing appeared on my screen.

Then the support person suggested I click on the Bluetooth icon at the top of my computer screen - the one that looks sort of like a "B". Then click on "Set up wireless devices"

My wireless keyboard was in the list and when I clicked on it, I got a message that said, this device already paired.

So I tried the keyboard again. Just a bunch of letters - that didn't appear on the screen - at first.

Then they did.

Tried again.

Still stodgy.

Finally, it started working ok - and the support person said probably it would help after 1. inserting the batteries 2. turning on the keyboard 3. clicking on the Bluetooth icon on the computer 4. clicking on the name in the list - to just RESTART the computer to get things moving again.

Hope this helps someone - it may not be the only way, but it did solve my problem. (And my caps lock button, when I press it, comes on solid green).

Good luck!

Apr 15, 2012 9:27 AM in response to JasonBChen

Took the rechargeable batteries out of the keyboard and put them on to charge before I went to bed last night. Everything fine. Got up this morning, put charged batteries (it's an old 3 battery version and drinks them like there is no tomorrow!) in. NOTHING.

Read about the aluminium foil trick. I just folded a little piece small enough to go down the 'tube' rather than rolling into a ball. Everything fine. Thank you.

(Someone mentioned that it could be slight differences in battery size - obviously not the problem here as the batteries are always the same.)

Apr 16, 2012 2:27 PM in response to JasonBChen

Been having problem with aluminium wireless keyboard for a couple of days following battery replacement (low battery warnings given for preceeding couple of days). Keyboard would not turn on again. Tried several sets of new batteries from local shop and even tried batteries from TV remotes (which I knew were working), without success. Thought I'd check the forum for the first time and, MAGIC, aluminium foil suggestion did the trick !!

I've never registered on these forums before and just wanted to say, THANK YOU.

May 8, 2012 7:47 AM in response to whellock

I had to really press down the piece that I put in to make the batteries fit so I don't think that I could fit a bigger piece in. According to the Apple bluetooth support the green light on the keyboard should flash on and off as this means it can be connected via bluetooth. My keyboard is doing this but is not showing up on the bluetooth list. Also I must add that I only got my keyboard two months ago so I don't know if this trick would work on my model?

May 18, 2012 6:24 PM in response to arthurc

This solved my problem...Thank you, thank you, thank you!!!

arthurc wrote:


Same thing today. Low battery warning on the wireless keyboard (model A1255). Replacing them resulted in a keyboard that would not power on (no green light on power button press). One of the posts indicated it was a bad battery contact on the + terminal (thanks for the clue!). Looking down the tube, there is indeed a plastic ring that the battery rests on. I took a paper clip and created a small spiral of metal and snipped off the remainder. I dropped it down the tube and rattled it around to fall into the hole. Dropped in the fresh batteries and voila... it works. YMMV.

In general Apple stuff is pretty well built. I'm surprised that something so trivial is happening.


Message was edited by: lindaleelou

May 18, 2012 6:23 PM in response to NSNO1878

If the light is blinking try re-paring it using Set up Bluetooth Keyboard. I put a metal earring backing in mine and was a tight squeeze to close the battery compartment. Worked like a dream! Thanks again arthurc!

NSNO1878 wrote:


I had to really press down the piece that I put in to make the batteries fit so I don't think that I could fit a bigger piece in. According to the Apple bluetooth support the green light on the keyboard should flash on and off as this means it can be connected via bluetooth. My keyboard is doing this but is not showing up on the bluetooth list. Also I must add that I only got my keyboard two months ago so I don't know if this trick would work on my model?

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Wireless keyboard won't turn on after changing battery

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