That "fault" sounds like the 50v pin next the GRD on the display cable IIRC. Can't remember the model but I do remember _someone_ ranting about it at the time. You are a good educator Paul and I like your work. 👍 I hope you are making a very comfortable living from your repairs because you deserve it.

@A2000MHz

6 ай бұрын

Not comfortable yet but getting there. The fault you mention was on almost all the intel MacBooks starting in 2016, and again once apple released the m1 that one was definitely corrected. All the voltage pins are surrounded by ground pins now. We think these are stupid mistakes but I think apple knows exactly what they are doing.

Just did one today - fortunately repairable, though unfortunately it was fixed only 2 months ago; different cap this time but again 2V5 NAND :\ They're a regular occurence here along with the A1990's. EDIT: UPGRADE Your FlexBV! I'm almost certain you've got access to v5 now, and you'll get Teboview support too :D

@MrPnew1

7 ай бұрын

Don’t delay, upgrade your FBV today

@TheWangbolizhong

7 ай бұрын

haha@@MrPnew1

This is how to teach people, thankyou

Think different indeed...

@JimAllen-Persona

7 ай бұрын

They are... new ways to extract money from you.

@Daniel_cheems

7 ай бұрын

@@JimAllen-Persona Not from me :)

Interesting to know. Thanks Paul.

Your thumbnail look so much like Luis old video thumbs. 😅

This just makes me mad. Borderline criminal negligence to design it that way! Horrible to loose data :(

Why didnt they put some sort of clamping diode on the 2V supply rail? I always do that when designing a board, I thought this was normal with low voltage electronics. And I am not even talking about chips that hold someones data. The idea is that the diode starts conducting from the overvoltage, gets overloaded and fails short. This obviously shorts the destructive voltage to ground and saves the IC.

@A2000MHz

7 ай бұрын

What I have noticed about Apple design is that they never, never, think about failure modes. They put zero thought into dust infiltration, moisture, or liquid. All that they care about is that when you use the device in the manner and place they expect you to use it, it works. Anything else doesn't matter.

Happy New Year Paul. This atrocious design decision and makes FlexGate seem like a minor transgression. Apple, why??? Did you request Texas Instruments put the 2.5v NAND power rail right next to the ~12v PPBUS power rail, it wouldn’t surprise me at all.

Another thing I have sometimes wondered is if it would be possible or advisable to install a 2.5V Zenner diode in parallel with 1 of the caps. That way, if the chip did go bad or corrode, it would either send the excess over to ground or just short bring the rail down. But it wouldn't send 12V to the NAND

@pldaniels

7 ай бұрын

Sadly it probably won't help much; the VREG is capable of enough current that it would overpower the zener and those zeners have terribly soft knees below about 5V6. Even if you put something like a crowbar circuit with a TL431 as the reference you'd probably find it still doesn't save the day every day. Best solution I see here is a physical redesign and keep the whole VREG controller away from the liquid :( Art of Electronics has a very good section on dealing with overvoltage situations and the pros/cons.

Hi Paul, great video. Did Apple rectify this issue in later models? (change the chip or moved it)?

@A2000MHz

7 ай бұрын

Yea they fixed it, these chips are still used in newer machines but they are not near the edge. But they are still not underfilled or sealed in any way so still a danger.

I hate last 2 intel MacBook's, I think they are just waiting to be door step in some point, so much hardware problems If you replace SSD do you have to reprogram as well ?

I don't get why people don't do backups, especially phones. My own kids are the guiltiest. One of the reasons I have a ds220j is because my daughter doesnt do backups and her macbook automatically backs up over wifi when she connects at home. P.S. I probably only have .18mm gap between my balls. What's so bad about that?😂😂

@A2000MHz

6 ай бұрын

Biggest reason I got a DS1819+. I had a Lacie drive go bad on me and lost a decade of pictures. Almost everything from my first digital cameras (Nikon D100 and others). Now my image library is synced between my laptop to Synology, and weekly syncs to an external WD.

@josephking6515

6 ай бұрын

When I was running my business I had my data, especially financials, backup to *four* different locations and media. I once had *three* of the backups fail. I was cacking myself when I restored number 4. _There are two kinds of people. Those that have lost data and those that are going to lose data._

Why apple doesn’t use underfill in this case where would help but really often apply it for example under Tristar chips in iPads where is no moisture…the answer is: to make repair so hard that U gonna buy new device🤦🏻‍♂️

Sadly those chips are bad.. idk why and idk how but I've seen cases where there isn't any dust, liquid, corrosion or anything and they go bad even on other models than A2141.

you can't save them All 😞

@A2000MHz

6 ай бұрын

My track record for A2141 is terrible. 75% of them are all dead like this.

@QsTechService1

6 ай бұрын

@@A2000MHz Not good At least you tried to say people's data Unlike apple They should have a 20 year Recall On this

Would a service adding protection like conformal coating to new, properly working devices be a stupid idea?

@MrPnew1

7 ай бұрын

See 21:40 that is exactly what Paul does. Did you comment before watching all the video??? 🤣

@abavariannormiepleb9470

7 ай бұрын

Commented after his short introduction to the video, yes. Thought about this a few times over the years and wondered why you mostly have to DIY such a thing with consumer products. PS: Still have a fully functional 2012 MBP A1286 where even the original battery is still above 80 %. Am sad about this fragility in more current devices.

@JimAllen-Persona

7 ай бұрын

@@abavariannormiepleb9470 It's more that it's intentional thats annoying. No reason a Mac can't have replacable RAM/storage except profit (= "security")

For those wondering how dust can conduct electricity, Keep in mind that most of the dust is fiber, not dirt from outside, and you also get a lot of dander. Most of the fiber dust that gets inside has had contact with the skin. The skin has oil, and salt to keep it moist. This mixture of oil and salt also helps keep the dust moist. Think of how damp rid crystals (calcium chloride) pull moisture out of the air. By definition, a salt is an acid and base combined together. Sodium chloride, is sodium (base), and chloride (acid). Calcium and Sodium are both metals. The salt not only pulls moisture out of the air, but it also greatly increases the conductivity of water. As the solder dissolves, the conductivity goes up even higher. And then you also have the obvious situation where you get condensation from going from a cool environment to a warm steamy environment. Pure water has practically no conductivity, but a little salt, and metal oxides goes a long way.