Fixing USB-C Macbook that doesn't charge || College prof claims real programmers use mac?

next machine that we have is liquid damage no power so let's open this thing up okay how do we got here 17:08 this is not the touch bar version so we're the same thing applies I'm gonna unplug the battery because I don't want the amperage that the battery is pulling to change my reading of how much amperage the motherboard itself is taking I want to get an idea of just what's going on with the board so I'm gonna open this up so it thinks it's open and plug it in and we're gonna see how many amps this takes and also what voltage we're at so it looks like this is at 5.20 2 volts 0.02 amps so we're not even making our way to 20 volts which means we're not doing any negotiating with the charge there's a chip called the CD 32 15 and the CD 32 15 does all of the communication with the charger and that chip requires 3.3 volts BP 3 V 3 underscore g3 hot to be present alright we're gonna take a look around the board and oh dear God you and what do you know look at my CD 3215 oh yeah look at that isn't that beautiful that's beautiful let's do it look at that flux flow aim it does John that's also because it's new the board is bleeding a little bit now it is the rest of this disgusting board I still think that there's gonna be an issue under that ship because of how disgusting it was but I'd also like to see if peepee 3v3 underscore g3 hot is present so let's see if we're getting anything on PP 3 v3 underscore g3 hot and we are we're getting PP 3 v3 underscore g3 hot but we're still getting 5 volts on this which means that that CD 32 15 is bad or the stuff around it that looked really nasty has probably gotten to us I've gotten to the chip yeah so like this red stuff over here what's this is this worse yeah there's gonna be something talking to something underneath the chip so let's just try and get rid of some of that blood first this is quite a bit of blood there I'm also gonna have to ask Paul where it is that he hides the CD 32 15s because actually wait no I don't because I stole some from my desk just in case he would hide them and run away so I have Paul proof to my setup you always want to make sure that you've Paul proof to your setup so that Paul can hide things from you all right hmm in order to be able to clean that the way I'd like to clean it I'm gonna have to remove that chip so let's go ahead and move Paul Daniels is here Paul Daniels lives in a country where you're not allowed to import three-balled cd32 15s that poor bastard that poor Paul Daniels he doesn't know what freedom is he lives somewhere where they don't know what freedom is let's bring Paul Danielson freedom hmm okay Paul Daniels is here the man is that's going to lose a DotA tonight I've been on a winning streak with dota I've been streaming him a twitch and I am about to kick Paul Daniels assassin some dota I just ripped a pro pad god damn it what was that for mmm what did i do what did I do you a you're not connected how the hell are you not connected thank you all right so this attaches to this and I broke that but here's the funny thing the schematic says NC as in not connected so why would you bother running pathways on the board and creating a pro point and creating a trace and a via that goes to a probe point for something that's not connected that really doesn't make any damn sense this make this this this makes no sense whatsoever I have no idea why they would bother doing that maybe that fresh flux go on a place little chip rest let's see what we get here five point 22 volts and it's not changing five point 22 volts it's taking an extra 20 milliamps here but it's still stuck at 5 yep this is no good perhaps our other cd32 15 has problems as well or maybe some of that corroded junk down here actually matters hmm what is all this junk for because this doesn't look any good as you know as nasty as this stuff looks it doesn't look like something that would have actually destroyed anything hmm yeah this is speaker amps that's not something that matters for anything I could give a less about speaker amp perhaps our issues with the other CD 32:15 my phone for I want an iPhone for where is my iPhone for xyla ten apparently has a lot of money zabba ten sounds like a member of the Genius Bar come on stay on the board don't you try to get away there we go I just saw you fall in a place now you cool the title is self-explanatory wrote a CEO it's actually self-explanatory the title explains itself let's see I have a CS prof basically telling all the students to buy a MacBook Pro because real programmers use macbook so you should get used to them it sounds like we're me we are going to be shown how to do things using Mac specific software thoughts I think that that computer science professor sucks I granted I'm not a programmer but he's telling you that all real programmers use this so you should get this because that's what real programmers use now real programmers use what works for them and if a macbook works for you and you're a real programmer who makes real money then use a macbook if you're a real programmer and you're like paul daniels and you just sit there writing your GPL software using a Stallman created text editor then use that use what works for you but in college what they should be doing is they should be trying to get you to figure out what works for you and they should try to get you in a state where you can think for yourself but college doesn't seem to do that anymore College appears to just kind of tell you what it is you should think and that's one of the reasons I'm not a big fan of college being free because college seems to be less about teaching you how to think and more about telling you what to think and I don't think that's good at all and I'm not a big fan of it aha 20 volts here we go 20 volts 2 milliamps look at that so we've made some progress here see that 20 volts but it's only taking two milliamps which means it's not turning on that's no good what's his Stallman says paul brian richard stallman is Paul Daniels is biological uncle he taught him everything he knows and how to engineer software yeah so we are getting 20 volts now but it's taking twenty or two yeah that that's 20 milliamps all right so now we have to figure out why this board is not turning itself on so we fixed our first problem and now most certainly we're going to have secondary issues and other things as well so the first thing I'm gonna do is go through some basic power rails on this MacBook while I'm waiting for the ultrasonic cleaner to heat up because I imagine the ultrasonic cleaner is going to help me with this this is one of those boards that's nasty enough that I would use the ultrasonic cleaner on it pp bus P P bus PPP PPP bus so our P P bus is 0.6 volts that doesn't sound like a healthy PP bus hmmm is pp bus shorted 55 ohms yeah that's a shorted little pp bus what could be shorting our pp bus to ground here's where our pp buses we're going a solder or wire from the power supply to our pp bus and then we're going to inject voltage into our pp bus see what gets hot this is not a very sexy-looking solder joint at all but it's fine it'll do because this is just a testing solder joint to inject voltage into the board to see what it is that gets hot along our pp bus and at this point you can probably tell that I'm just looking for excuses to continue saying pp bus B P bus P P bus all along the P P bus let's get started and inject some voltage into that P P bus and see what it is that gets hot on my board we're gonna start with point 5 volts and we'll go up a little bit from there and it looks like whatever was getting warm just burned its way out because it's no longer getting warm interesting did our short circuit just magically disappear it looks like it did Wow yeah 12 point 5 volts we're taking 0.001 amps Wow looks like measure whatever was short-circuited just burned itself out right in front of me damn short circuit has burned its way out of the board automatically I wonder if our pp bus will be present now maybe let's see what it is we get on the multimeter let's measure our pp buses resistance to ground and it's going up to kill ohms so before we add 60 to 50 to 60 ohms and now we're getting 2900 three thousand ohms thirty five hundred ohms and up it goes so it looks like our short was something that it was intermittent I got blown up interesting alright let's see what happens when we plug in a charger so when we plug in a charger five point 22 volts here we go twenty volts 400 MLM six hundred milliamps so now it looks like this is actually turning on check it out folks we've got CPU v core look at that that's CPU V core this is a Macbook board that's turning on that's beautiful that's a high peepee bus well looks like we solved our problem first we had an issue where the cd32 15s which are supposed to talk to the charger and negotiate the USBC charge of being 20 volts instead of 5 volts weren't working due to heavy corrosion we replaced one but it still didn't work so then we replaced the other one interestingly enough they were both Kura bad even the one that was not really corroded after we did that it still wasn't turning on and when we checked our PP bus g3 hot PP bus g3 HOD had a 50 to 60 ohms short to ground we injected voltage in there to try and figure out what it was that was shorting it to ground and the moment we injected voltage it immediately stopped being short circuited just to make sure it wasn't some sort of intermittent trolling short I up the voltage all the way to 12 point 5 volts and left it there for a while and it still didn't take any amperage so I think all this thing's gonna need now that it's getting CPU v horn turning on is a nice thorough cleaning in the ultrasonic to get rid of any junk on the board that's gonna be causing shorts or bridges that's going to keep it from working and to get rid of any corrosion unto the chips after that it should be set and ready to go and if you want a Macbook fix like this hand it over to send your MacBook Calm we offer repair services and more so this is the original board that I was working on earlier if you just take a look at what it looks like after the ultrasonic cleaning this is our CD 3215 area that was the corroded not connected pad

Channel: Louis Rossmann

Views: 159,915

Keywords: macbook, logic board repair, logic board repair macbook pro, logic board repair macbook, macbook pro wont start, fix macbook doesn't turn on, macbook pro charger not working

Id: nZtH3biLKwc

Length: 24min 14sec (1454 seconds)

Published: Sun Jan 20 2019