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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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WTF MacBook Mid 2012 removed c6213 and now it works, had no power b4

For days I’ve been trying to figure out why my 13” Mid 2012 MacBook wouldn’t power on. I tried a few tricks but none would work so I poured some alcohol on a few spots and found some bubbling on one section. I poked at c6213 on the Logic Board and it came off then suddenly my MacBook power on.

I’m not sure what c6213 does, or if it’s needed but it seems to be working fine without it. I’m was shocked when I heard the machine powering on because I thought for sure I had messed something up. Can the machine stay running good without c6213?

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What you encountered was a shorted out capacitor, it does happen!

As to why taking out off worked, there is a second cap in series which is now keeping your system running. I wouldn’t run the system like this as the load will kill the other capacitor! Then you’ll have more to fix.

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Time to get a replacement 1.0 UF 20@ 6.3v 603-1 package.

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11 Comments:

Yes, seems that is what it was. That tiny capacitor. Luckily it shouldn't cause any issues. I guess I got very lucky.

I asked over at TCRS Circuit and Tim said this

"That is going to be a decoupling capacitor for audio. You should be fine without it, but you may notice some cracking/popping on audio in some situations"

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@craig106 - You're too quick! I was still writing! Please review the full answer don't use your system this way as it will fail!

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Oh sorry. How hard is it to replace? Any idea where I can buy this? I appreciate your help!

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@craig106 Have you soldered SMT devices before? You may want to find someone with the deeper skills and tools to do it, and they may even have the needed part.

One of the problems you'll encounter is you need to make a minimum purchase, so a 50 cent part will cost you $20 or so bucks online. Depending where you live you might have a good electronics parts store near you. They will often sell you a few for a buck or two.

I often use Mouser And here's the part Capacitor SMD 6.3V 1uF X5R 0603 20%

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I have very some experience with SMT soldering but dealing with the tiny parts give me problems. It wouldn't be the tidiest job.

I also just noticed the keyboard backlight is not working.

I will see how much the repair cost and go from there. I realize the machine is older and may not be worth the cost to repair. If so, I may attempt to fix it and use it has a learning device.

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