Fastest 2021 Macbook Pro "No power" Repair.

[@pldaniels]

For those wondering, the UV Cure lamp is the "Qianli Intelligent UV Curing Lamp" www.aliexpress.com/item/4000996251647.html I bought the one with the battery, a little more expensive but saves having to constantly have a cable handy

[@ststele]

Hey nice editing! This sort of thing is really hard to do & you nailed it.

[@camilobusiness9702]

Haha as you say at the end of the video. Very lucky this time! 👍🏻👍🏻 even if it’s no a hard fix you show your tecnics and that’s great to learn a little bit more every day. Thnks

[@TheTascam56]

Am enjoying these shorts! Keep up the great work Mr Daniels! Hope Elita is well also the furbabies 👍

[@pldaniels]

They're all numerous and demanding!

[@LawpickingLocksmith]

Paul is always very nice to listen too and very helpful. Big Thanks!

[@Timpano_Francesco_Repairs]

Hi Paul, nice short guide, very good format...thank for sharing you way of working.... bye Francesco Timpano from Florence Italy

[@onewheelnut]

Interesting format, i think i like it, A quickie now and then is nice, but there are times when a long sesstion is better.

[@pldaniels]

Been a bit of a shortage lately of the longer format content, just haven't had any jobs that lent themselves to that.

[@leoburn-i9o]

Is that issue can affect magsafe port too ? Because I have the same issue and my MacBook charges only when it's off. Also, I have one usb-c not working at all. The second one to the left.

[@martinmcfadyen]

I know editing must be a pain in the ass but the result is great. Short, educational and entertaining ✔️

[@mirceaalicu]

I wonder what mr. Daniels is doing these days… been a while since we heard anything from him

[@AppleTechPro870]

Where can I find this exact capacitor if I wanna replace it.

[@pldaniels]

A donor board typically but honestly, not even worth the trouble; there's enough tolerance in the decoupling on this rail that you can live without it without any real notable ill effect. You'll probably end up degrading the neighbouring caps in the process of trying to fit the new one. It's a 33uF 16V T-case type tantalum cap. Search DigiKey, Mouser or similar to find a replacement.

[@AppleTechPro870]

@@pldaniels Thank you.

[@AppleTechPro870]

@@pldaniels I removed the burnt capacitor. But still nothing. After putting everything back the computer has the same issue. No charging and no power. Tried different cables. Used multiple USB-Cs and still nothing. I even put to charge for overnight to see if it might charge but no hope.

[@duzadam9980]

is it same a2485 ?

[@pldaniels]

Basically is a 13" version of the A2485, yes.

[@AppleTechPro870]

Can anyone help. I removed the burnt capacitor like in the video. Although mine was second from the left to right not the fourth like in the video. But there is still the same issue. When plugged into power there is no overheating or new burning smell which I have seen technicians doing in the videos and showing short circuit. I can’t figure out what else is causing the board not getting any power. I swapped motherboards from other computer I got to test out and every component is working in the housing of my computer with new motherboard. So, the ports and battery, etc is fine. I pit the burnt motherboard into new computer housing still the same issue. So i know for sure there is something causing the board not letting any power to other components or could be completely dead. Can someone help me out. Or does anyone had or having the same issue and how they fixed it?

[@pldaniels]

What's the resistance between the pads of the capacitor that you took off? Sounds like either the input fuse/MOSFET has blown (if there's no short) or the internal layers under the burned capacitor have formed a short due to carbonisaing of the fibreglass resin cooking off :(

[@AppleTechPro870]

@@pldanielsi didn’t check the resistance on the fuse I took out.

[@arekx]

What was that UV light device?

[@josephking6515]

It was a UV light device. 😁 Oh bum. Sorry just looked but it's not on his pldaniels.com/tools page yet.

[@pldaniels]

Search "QIANLI UV Curing Lamp" on AliExpress. There's two variants, one doesn't have a battery, the other does. I bought the battery one, so it's a little more expensive ( about $30 USD ?) www.aliexpress.com/item/4000996251647.html

[@AppleTechPro870]

I went to apple to get diagnosed. After diagnosis they told me it is motherboard issue and there is a burn smell. They quoted me $750. I paid about $2k for the computer and now I am gonna pay another $750 to get it repaired? Never. I fix electronics myself but I never done MacBook yet. I will not pay that much money to get it fixed. After watching your video, I opened up mine and yes the same capacitor blown. Although mine is the second from left to right. Hopefully after desoldering it the laptop will work again.

[@jeazyee1079]

And it was working again?

[@scratchyoureyesout4263]

Thanks Paul. 😊 I love the kitties and now wildlife at the end. Great idea!!

[@pldaniels]

Thought I'd change it up slightly.

[@josephking6515]

@@pldaniels 😢

[@gabrieln5357]

Nicely done!

[@oldbatwit5102]

Forgive my almost total electronic ignorance but.... Would it be reasonable to add a capacitor in parallel, (piggy back?), to compensate for removing that busted one?

[@pldaniels]

Not in this case. If you view the schematics for the capacitors on this rail there's a large gang over them distributed across the board. This is why in the voice over I comment that losing this one cap is only a ~5% loss and within acceptable operating envelope tolerances.

[@oldbatwit5102]

@@pldaniels Thank you.

[@josephking6515]

@@pldaniels Would you view the schematics using pldaniels.com/flexbv5/ ? 🤷‍♂

[@LawpickingLocksmith]

@@pldaniels I remember them 4 bit computers being built in the 1970's using discrete 14 pin TTL chips. All on 5 V and every chip consuming mA's . Low ESR capacitors were less advanced using discrete wires adding inductances to increase to the challenge of keeping them rails up during heavy logic use. Some boards had all chips on sockets for easy repair. Sockets adding more inductances adding to the challenges of keeping the 5V rail within specs meant speed restrictions. Nowadays having even SSD chips soldered close to the processor is a must to maintain their design speed. Louis Rossmann thinks that Apple was evil. They are just pushing the boundaries of speed in a battle of Chinese firms like Huawei pushing their speed limits on a range of products from phones to internet routers. Right now the US in conjunction with Taiwan is ahead of the speed game. Once Taiwan will fall to China the tides may turn. Huawei has a more efficient operating system , another key ingredient of winning the speed game. Not sure how low operating voltages may go, the lower the more important are low esr capacitors closer to them chips to reduce wire inductances.

[@Peter-Retired]

Very Good Paul 😺

[@y00g]

Il always watch a shorter video over a longer video

[@josephking6515]

I don't know why but a short video takes less time to watch than a longer one. 😲

[@somewaresim]

The worst thing about that repair is the disassembly/reassembly! ;)

[@pldaniels]

Agreed; especially if you have to do multiple repair cycles on a board.

[@GregM]

Heh @pedro147 someone repairs MacBooks newer than 2020 models (inside comment re another live stream)

[@MrPnew1]

True Greg 😂 I tried to tell him didn't I

[@bblod4896]

If those capacitors are all in parallel, couldn't you mate another on top of the other capacitors on either side? Or, substitute one on either side with a larger value if it was needed. Thanks for the video Paul. 🍻 Edit: I should have read the other comments first 😢

[@pldaniels]

Indeed, it's just not absolutely required. The tolerance on these caps is usually ~20%. Effectively you've slightly shrunk the operating envelope for the board but in percentage terms it's not a big thing. In most cases these boards/circuits are designed with a solid 10~20% excess of decoupling capacitance to provide stability across a very wide range of operating environments.

[@bblod4896]

@JimAllen-Persona Part of my charm 😂

[@ststele]

​@@pldaniels me watching Paul explain why he's left a cap off.. hehehe :D That is grounds for crucifixion on this platform.

[@S_RaccoonPotatoWizard]

Thanks for the info! I've always wondered why a cap can be removed, and not necessarily replaced.

[@DanielMarinescu]

when Sorin from Electronic Repair School does this, many people say he did a dodgy job, not fair

[@josephking6515]

*WHAT?* you didn't need to use your excellent and inexpensive FlexBV v5? pldaniels.com/flexbv5/ Where's the kitties? 😢 🤷‍♂

[@pldaniels]

I actually could have bought that in I suppose... could have at least shown people the rail that the cap was on and why it was okay that we left it off... could have, too late now though. TX for linking ;)

[@Chriva]

@pedro147 come here :D

[@TheWangbolizhong]

👍

[@boniamar1661]

I try to say hello

[@georgedyson9754]

Too short and not very interesting as a result.

[@pldaniels]

Well I could always pretend to fix other things and dilute the authenticity of the video. Here's a bit of advice - no matter what you do in terms of content generation, there's always someone out there who's not happy with it; looks like it's you today.

[@MrPnew1]

@georgedyson9754 Go away and watch somebody else then. Simple

[@georgedyson9754]

Just that your normal live videos are so good because they give an excellent guide to understanding and fixing electronic devices. This video went by so quickly it did just not live up to previous quality.

[@josephking6515]

@JimAllen-Persona It cost me a left finger movement on the mouse to click 👍. Just _outrageous!_ 🤦‍♂