Some of the things that I always say to students jumped out at me on this video. 1.) Be wary of trying to make the problem be the problem you want to solve. The problem is what the problem is. 2.) How did it come to be this way? This question helps us not pursue random rabbit holes that really don't have a mechanism for failure in situation X. 3.) Shorts don't get hot. Tiny wires get hot. When a cap fails, how does it fail? It becomes a tiny wire. When a chip gets electrically damaged, how does it fail? It becomes a tiny wire. When a speck of mud makes ball A touch ball B under a chip, it makes a tiny wire. These things will all get hot because tiny wires get hot. When an idiot blasts heat at CPU what happens? Two full solder balls bridge together and make....a big fat wire. As soon as you saw no heat, it could only have realistically been CPU or BL driver.
Yes and in this case since the "short" conducts electricity better than the traces inside the PCB, the traces get hot and not the fault. Thanks for watching my videos. I had fun making this one. :-)
I really appreciate watching you learn and I'm really glad that you are back at it, doing videos for us mere mortals, as you got me really scared for a while. I've been in the electronic troubleshooting and repair for a long time, but never on consumer products. Anyways, just wanted to let you know that your impedance variation was normal. It was cause by the heat you used to remove you components. Well, the boards was still broken, just not worst. Also, looking at the schematics for the iP6, that power line splits into 3 other power lines. I guess they don't usually cause problems, but since this one was broken by a prior repair attempt, it might be worth looking into. As for big components swap, well, do your research well before going into it. The better the tools, the more control you'll have over your process and the easier it'll be and the better yields you'll get. Also, someone mentioned the humidity having a part in it. Well, he's totally right. We use special equipment to try and mitigate that in the industry (I remember a batch of chips exploding because of that).
Oh man, the RAM on the A9 CPUs is so fragile. You mentioned humidity and on those, I think humidity may be just enough to cause the RAM to bulge when the board is heated. Sometimes even if I haven't gotten the board wet, I put them on a hot plate just below boiling temp for a good long while, then raise the temp just above boiling for an even longer while. I wind up drying them all day long before using hot air. I try to keep the humidity in the shop as low as possible but with what I've seen from the A9 CPUs, it's immensely important to be sure these boards are dry before heating. Thanks for the commenting and for the info :) I may not get to post a video today but I wont let that stop me tomorrow.
jason a couple of days ago I got an Iphone 8 plus was sent t me because of short on vcc_main it took 3 amps but no heat the surprise was the capp where the short was in heats only 3 degrees the whole board was 24 but the short was 27 so you must not let your hands in front of the thermal camera
I wonder if you could take a board like that to a place that has an xray machine and get it imaged. A veterinarian for example. It might allow you see if you had solder balls under any chips that are causing shorts.
Can u make a video of you recording setup? Like what program do you use to record, how did you setup the on screen power supple and DM, how do i make the thermal camera show, and how do you switch between them for the record, thx.
When I watch you use those tweezers, pinchers, clinchers and scalpels so dexterously, I begin to wonder if you should have been a neurosurgeon! Love it! Best wishes.
I would send it to Jason at STS. I’m sure he’ll get to have a good look around it for you... saves messing around. Good attempt Jason, gets a BIG 👍 from me. 🇬🇧
@@og-0110 STS Telecom does micro-soldering. But there are people who literally almost build the information back up and are able to recover the data. It is an absolute pain of a job, But its such an art.
I think if you were the first technician to touch this board you would have had no problem fixing it. As it sits though it looks like three or four novice repairers have hacked at it thinking they knew what they were doing and have just made a mess of it. Good try anyway mate but you can't always win when pushing shit up hill from the start. Thanks for sharing it with us.
Thanks. The supply is more than what is needed really. It's better to get something that works and spend the extra $ on other tools. I sort of regretted buying it for a while but now I really like it. A low end power supply will do just as good.
It's One of those boards, sent to make you mad, or madder. To my untrained eye, the pcb looks grungy and baked :-( Difficult to move the eyebrows like electroboom, i think he has catapillars as eyebrows.
Good luck with learning the 6 and 6s board swaps! I always have issues with the RAM cracking -_- I think it's a high humidity thing here locally. Need to bake the board at like 105 for 30 min before hand or something. Nice video though! Great to see how you go through trying to track down a complicated short like this
Did you verify that you didn't have a PP1V8 short carried over to PP1V8_SDRAM via Meson? Looks like you left the one thing most often that would have been messed with on a prior repair touchIC.
Yes. It's been here for way too long and I had checked pp1v8 when it was first on the bench. Your comment nearly gave me a heart attack tho (after all I've pulled from the board)! I just pulled meson and there's no visible bridging. Still have near 0 ohms on 1v8_sdram.
@@ststele You'd also hate yourself if it was the classic 1v8SDRAM bad cap (it won't be) but wiggle it out anyway because it has a mechanism--this was flexion damage which bothers that corner of the CPU and often kills that cap.
Bummer :( I'm sorry you had to watch this. I've worked on it a bit more and I'm 99% sure that the short is under the CPU. There are techs who can re-ball it with reasonable success though. It may be possible for them to get data.
STS Telecom I can agree with you on that. I think I used too much heat on the pcb , so much that it went through the other side and created a short. I’m still yet to buy a thermal cam, and practice on old boards. Your videos inspire me to become a better technician 😊
Dude. It's pronounced "SOUL- DURR" Not "SODDER". I don't know where America got this nonsense word from but the only pronunciation is "SOUL - DUR". Please and thank you.
![[Wet iPhone data recovery] UPS took 3 weeks to ship this phone 50 miles - a 2000 MILE journey!](http://i.ytimg.com/vi/JsXRoljqHFI/mqdefault.jpg)
Some of the things that I always say to students jumped out at me on this video.
1.) Be wary of trying to make the problem be the problem you want to solve. The problem is what the problem is.
2.) How did it come to be this way? This question helps us not pursue random rabbit holes that really don't have a mechanism for failure in situation X.
3.) Shorts don't get hot. Tiny wires get hot.
When a cap fails, how does it fail? It becomes a tiny wire. When a chip gets electrically damaged, how does it fail? It becomes a tiny wire. When a speck of mud makes ball A touch ball B under a chip, it makes a tiny wire. These things will all get hot because tiny wires get hot. When an idiot blasts heat at CPU what happens? Two full solder balls bridge together and make....a big fat wire. As soon as you saw no heat, it could only have realistically been CPU or BL driver.
Yes and in this case since the "short" conducts electricity better than the traces inside the PCB, the traces get hot and not the fault. Thanks for watching my videos. I had fun making this one. :-)
WIRE = Wicked Infinitesimal Resistance Element
What is your thermal camera ? It Have at good image resolution
When you parallel the channels, the AM meter possibly shows the current thru only one channel. You have to double it: 1.8 A x 2 = 3.6 A total.
Ahhh, yes.. you are right. :)
I really appreciate watching you learn and I'm really glad that you are back at it, doing videos for us mere mortals, as you got me really scared for a while. I've been in the electronic troubleshooting and repair for a long time, but never on consumer products. Anyways, just wanted to let you know that your impedance variation was normal. It was cause by the heat you used to remove you components. Well, the boards was still broken, just not worst. Also, looking at the schematics for the iP6, that power line splits into 3 other power lines. I guess they don't usually cause problems, but since this one was broken by a prior repair attempt, it might be worth looking into. As for big components swap, well, do your research well before going into it. The better the tools, the more control you'll have over your process and the easier it'll be and the better yields you'll get. Also, someone mentioned the humidity having a part in it. Well, he's totally right. We use special equipment to try and mitigate that in the industry (I remember a batch of chips exploding because of that).
Oh man, the RAM on the A9 CPUs is so fragile. You mentioned humidity and on those, I think humidity may be just enough to cause the RAM to bulge when the board is heated. Sometimes even if I haven't gotten the board wet, I put them on a hot plate just below boiling temp for a good long while, then raise the temp just above boiling for an even longer while. I wind up drying them all day long before using hot air. I try to keep the humidity in the shop as low as possible but with what I've seen from the A9 CPUs, it's immensely important to be sure these boards are dry before heating. Thanks for the commenting and for the info :) I may not get to post a video today but I wont let that stop me tomorrow.
jason a couple of days ago I got an Iphone 8 plus was sent t me because of short on vcc_main it took 3 amps but no heat
the surprise was the capp where the short was in heats only 3 degrees the whole board was 24 but the short was 27 so you must not let your hands in front of the thermal camera
Hi bro which thermal camera you using for repair
I wonder if you could take a board like that to a place that has an xray machine and get it imaged. A veterinarian for example. It might allow you see if you had solder balls under any chips that are causing shorts.
But x-ray images can be in real dimensions there is no zoom
Can we get an update on what the problem actually was?
Can u make a video of you recording setup? Like what program do you use to record, how did you setup the on screen power supple and DM, how do i make the thermal camera show, and how do you switch between them for the record, thx.
What would cause a xr to overheat, no picture no lights no charging.
heya oke this is a very complex damage hope some how or someone can fix it
When I watch you use those tweezers, pinchers, clinchers and scalpels so dexterously, I begin to wonder if you should have been a neurosurgeon! Love it! Best wishes.
I have watch the video, could you check the cap near the cpu there is a solder ball maybe if you remove it will solve the problem
As always, amazing content but I think you were running into problems with the IR because the camera wasn't aligned.
Which model thermal cam is that ? I just ordered the Flir one pro
Flir one pro. Not the LT but the LT would likely work pretty good too only lower resolution.
@@ststele awesome.... That's the one I ordered
YEAHHH ONE MORE 45min VIDEO!!
Enjoyed the video.
you are awesome. good job fault finding. its a bummer when you cant pin point it but dont let it knock you down
I would send it to Jason at STS. I’m sure he’ll get to have a good look around it for you... saves messing around. Good attempt Jason, gets a BIG 👍 from me. 🇬🇧
I cant find that flexboard view can you please provide a link
pldaniels.com/flexbv/ by the great Paul Daniels
Great video as always! Big 👍🏻
What do you mean by recommending it to another shop if it is under the CPU?
If I think it's recoverable but requires a larger brain, I will recommend them to someone who may be able to help.
STS Telecom Is there someone with a larger brain than you? ;-)
@@og-0110 STS Telecom does micro-soldering. But there are people who literally almost build the information back up and are able to recover the data. It is an absolute pain of a job, But its such an art.
good job. thanks sr
Excellent. Thank you for the video.
Soft zxw bro?
Great sir
I think if you were the first technician to touch this board you would have had no problem fixing it. As it sits though it looks like three or four novice repairers have hacked at it thinking they knew what they were doing and have just made a mess of it. Good try anyway mate but you can't always win when pushing shit up hill from the start. Thanks for sharing it with us.
What if you heat the whole board and use a knife to wipe ALL the components off then your find the short for sure 😂😂😂 your half way their!
great piece of scuba diving
I would love that power supply but little too pricey. Good video.👍
Thanks. The supply is more than what is needed really. It's better to get something that works and spend the extra $ on other tools. I sort of regretted buying it for a while but now I really like it. A low end power supply will do just as good.
cant win em all,still always leaning
Took the words right out of my mouth lol
It's One of those boards, sent to make you mad, or madder.
To my untrained eye, the pcb looks grungy and baked :-(
Difficult to move the eyebrows like electroboom, i think he has catapillars as eyebrows.
I got it nailed down. I just need the electroboom music. :D
Three amps and no thermal effect! Really scary
always watching from bisha k.s.a. wazzz up philippines
Good luck with learning the 6 and 6s board swaps! I always have issues with the RAM cracking -_- I think it's a high humidity thing here locally. Need to bake the board at like 105 for 30 min before hand or something. Nice video though! Great to see how you go through trying to track down a complicated short like this
Thanks. The A9/6s RAM crumbles away so easy. It's like it just falls apart.
00:33 not meaning to be nasty but I would say that whoever sodomised this board would struggle to put their socks on in the morning
Did you verify that you didn't have a PP1V8 short carried over to PP1V8_SDRAM via Meson? Looks like you left the one thing most often that would have been messed with on a prior repair touchIC.
Yes. It's been here for way too long and I had checked pp1v8 when it was first on the bench. Your comment nearly gave me a heart attack tho (after all I've pulled from the board)! I just pulled meson and there's no visible bridging. Still have near 0 ohms on 1v8_sdram.
@@ststele You'd also hate yourself if it was the classic 1v8SDRAM bad cap (it won't be) but wiggle it out anyway because it has a mechanism--this was flexion damage which bothers that corner of the CPU and often kills that cap.
99% are shorted traces in board
Hello Jason
Hello :)
That came from me, this is so sad 🙆🏾♂️. Will reply to your email about that ASAP.
Bummer :( I'm sorry you had to watch this. I've worked on it a bit more and I'm 99% sure that the short is under the CPU. There are techs who can re-ball it with reasonable success though. It may be possible for them to get data.
STS Telecom I can agree with you on that. I think I used too much heat on the pcb , so much that it went through the other side and created a short. I’m still yet to buy a thermal cam, and practice on old boards. Your videos inspire me to become a better technician 😊
it does not matter where it came from jason it is the cpu lol pack it up and get on with the job lol or look at some adult channels lol
ace ace lol
😉
Dude. It's pronounced "SOUL- DURR" Not "SODDER". I don't know where America got this nonsense word from but the only pronunciation is "SOUL - DUR". Please and thank you.