My Macbook pro's charger turn on and off, how do I fix this?

What does the battery icon on the menu bar show?

I have a power adapter that some times does not show the light, but the icon will reflect what is actually happening, thus I don't become concerned.

Some time a few snaps or jiggles of the connector will solve the situation. You may also check if the connections on the power adapter and the MBP are clean.

If it is not charging, a trip to the Apple store is recommended, especially if your warranty is still in effect.

Ciao.

SOLUTION!

I had the same problem with my MacBook Pro Late '11. My problem started when my power adapter started to show wire (where the adapter and the cord that goes into the computer meet up) and wouldn't charge (no light), so I had to get a replacement from my neighborhood Best Buy. I bought the 85w and had the same problem you had and after a long ordeal of trying to figure out the problem, took it up to the Apple Genius Bar (thinking it was an internal problem). After a full diagnostic and finding nothing wrong with the computer hardware (past my warranty date), they recommended (as a last resort) to trade out my adapter with one of their's (for free). No charging problem ever since. Hope this helps!

Cheers!

-Kuya

The data as shown suggests that the battery is good but not fully charged but being charged. Monitor this to see if you can get it to charge to 100%. If the during the charging cycle it becomes intermittent, then you will have take the MBP and power adapter to the nearest Apple store or repair facility for a proper diagnosis

I would suspect the Power adapter based on this:

http://support.apple.com/kb/TS4127

Ciao.

I got the same problem but my original charger works fine on my girlfriend laptop but doesnt work on mine it always turns off then back again then off, so now im using her charger and it works fine on my laptop but i want to fix it mine...bought my laptop in england and im using a adaptor to use it in germany cant be that cause was fine for a year so have no ideia i've done also a reset smc and nothing wish someone could help me...

I am having the same problem! I recently bought a late 2011 13 inch macbook pro used. The battery will eventually charge to full and keep a good charge when unpaged, but when charging the battery icon cuts on and off, so it stops and starts and stops and starts.. very intermittent. I will also see the light on the charger going on and off.. Now, one thing different with me is that I have a replacement charger. I did not get the original Apple charger with the pre-owned Macbook Pro. I am wondering if anyone replaced their charger and the issue resolved or did they have to do any other kind of repair?

Thanks,

Paul 😕

Hey, so are you saying when you use a different charger it stopped happening? I am having the same issue (mine is a replacement charger, not Apple version) and was to figure out if its the charge or battery. battery charge cycle only in the 400s and holds a good charge.

Thanks,

Paul

😀

Pauletronic wrote:

I did not get the original Apple charger with the pre-owned Macbook Pro.

If the charger you have is an Apple counterfeit knock-off, it may look the same on the outside but not so on the inside. Have it checked out at an Apple store genius bar for FREE. If it is a fake, purchase a real one.

Ciao.

What is the percentage of charge?

Also open SYSTEM PROFILER>HARDWARE>POWER>BATTERY INFORMATION and post this information:

Ciao.

Click on the Icon in the menu bar an what does the drop down menu show?

Ciao.

Suggest you try to reset the PMC to see if this helps.. then recalibrate your battery..

Did it work? because i have the exact same problem with my MacBook Pro 13'' 2012 model ._.