Old but gold videos. Since the "right to repair" movement blew up, I am considering to learn electronic repair at a hobby level. Your videos just hit the spot for a complete beginner in anything electronics like me to actually try and stab my working components (carefully) to learn more.
Great tutorial! One thing missing in your tutorial is explanation of s5, s4, s3, s0 rails and when they are active. But this is the only video on youtube explaining power system architecture, and it's a big help for me. Your other videos on basic repair basics are excellent too, much better than most other repair videos out there in explaining things clearly. Thank you!
This dude rocks! I've been curious about electrons, protons, neutrons, etc., my whole life. I've fixed thousands of electronic devices, yet i still don't completely understand how it all works. Learning about electronics has always been a complicated, confusing, and laborsome process. Adamant IT however, makes it easy to understand cuz he gets straight to the point.
Very well explained ! I like short videos concentrated on one aspect of the subject. There is lot of documentation about the macbooks logic boards on youtube but most of them are strickly on repairs and it's difficult to catch up if you don't know the base to begin with. I know it's a lot of time for you dedicated to this tutorial but you will help many people to understand how these logic boards works and it will be easier to locate faulty components on these boards. Thanks for shearing your knowledge.
hey ,if anyone else wants to discover pcb trace repair try Saankramer Electronic Magazine System (should be on google have a look ) ? Ive heard some awesome things about it and my friend got amazing results with it.
I've been finding myself getting really hooked watching laptop board repair videos on UA-cam. I love troubleshooting, but always have to stop if I find that the issue is related to the mother/logic board because I lack the skills and knowledge to go any further. That's frustrating so I'm trying to understand how these boards work which'll hopefully provide me with the necessary skills to actually repair a board, rather than have to stop and say, "Nope, I can't fix it". I have 3 bad Macbook A1342 logic boards that I've basically kept laying around in the hope that I one day can actually fix one of them. This series seems like it'll help quite a bit. It's articulated really well and in a way that doesn't make it sound too daunting/difficult to process. That's good when learning as I'd often watch other videos and while they are clearly skilled and good at what they do (repairing boards), they can often make it sound really difficult to get your head around.
Ditto. I've worked many hours and spent hundreds of dollars fixing an old car's AC system... and I'm being held back by a blown capacitor... now if I had the tools and skills to replace said capacitor, I could have already fixed the thing.
i have a defective logic board for A1708 macbook pro (waterdamaged) & was trying to repair it,before this i had watched multiple videos in this regard - but could not catch up with their explaination( poor explantion) but after watching you videos i am getting a very good understaning of the working bascis of mac motherboard- A million Thanks for explaining it in a laymans terms
When any one say to this guy bad commentary than i cant understand why because i love this damnnnnnnnn rightllllyy video , very very very very welll !!!!! THX :)
Thanks for the videos , have been watching board repair videos for years, can do all the basics, where would you recommend to start this as a hobby, are there laptops makes that easier than others for beginners to start with ?
2:38 so that's why if you put a 1067 MHz ddr3 ram stick and a 1333 MHz ram stick certain slots on a board designed for only 1067 MHz ram, it will still boot. For context, if its done backwards or if both sticks are 1333 mhz, it won't boot. I'm guessing that's because the efi will initialize the boot on the 1067 mhz stick and once the operating system takes control of the hardware, its able to use the extra 1333 mhz ram stick at 1067 mhz. Its weird considering that you can use 1600 mhz ram in a board with a bus speed of 1333 mhz but not 1333 or 1600 mhz ram in a board with a 1067 mhz bus speed.
I have already have designed 2 boards more complicated than a regular motherboard and numerous others for automotive and i still struggle when a friend comes with a motherboard and it died with no reason and there is no schematic available. i start with trying to find a datasheet of the main chipset and from there the power on sequence. it is something that if i charge for i'd charge as for design :) Now my first step is to see if all the mosfets are ok and most of the supplies com on with power good and enable if it is something more than 3hrs i just go on ebay and if possible order the same board and give it to my friend as a gift:)
Great Video. 1 Question, is the PP18V5 and PPBUS_G3H lines also found in Windows/IBM cloned based laptops as well, or are they labelled differently? Thankyou. :)
Yea most laptops will have a DC-in rail straight from the DC jack, which becomes VIN (Voltage In). They go by various names, but fundamentally do the same thing. The main difference is that most windows laptops don't have a buck regulator for VIN, it's basically just raw charger power. There's an Inrush Limiter, but no regulator.
Yup, everything will be surface mount in a laptop. That particular input fuse is a very high rating, and is mainly there to break big incoming surges that might cause an electrical hazard.
Generally speaking, you'll get the same readings everywhere on a given rail. However, there is a technique for short detection where you use a super accurate multimeter (accurate enough to measure distance along a wire) to "triangulate" the approximate point of the short circuit. It's a very uncommon method on modern repair though.
I have an acer aspire 7600u AIO with the broken touch screen removed. The power button was a touch sensitive switch that no longer works as the glass screen is removed. I have downloaded the schematic for the motherboard HM77S01, but I can't figure out how to bypass that power switch. I had found two pins on the power switch board connector and wired in a power button, but that quit working immediately following win 10 latest update. Now the screen lights up for a view seconds and shuts off, and the computer doesn't even turn on
I have schematics of desktop motherboard,but there are no components number on the board like c500, r640, etc ,how do i know where components is located?
Great series of videos. My Dell 5559 won't turn on. When plugged in, charging light is on. Curiously, when I plug in the motherboard to test it I find that the area around the cpu heats up and everything in the power supply area is shorted and never turns off. All other power rails are off as they should be. No shorts in the main power supply. Is this an smc failure? Where should I look? Thanks.
CPU is low impedance and will appear to be shorted all the time. Am I understanding right in saying that if you plug in the laptop, laptop is off, but you have power and heat at the CPU? What voltage are you getting at the CPU inductors/coils when that happens? CPU Vcore should be somewhere around 1v, so if you're seeing 19v (charger) at the CPU vcore inductors, one of the vcore mosfets has gone short-circuit and your CPU is probably been cooked.
I have a concern sir, I have a laptop then it suddenly turns off on its own until it damages my OS. without removing a battery, it can still on but after 1 minute of booting, it will automatically turn off. even removing a battery, it is still the same, it will turn on, and after a few seconds or minutes later, it will automatically off. what do you think is the problem?
Adam, got a good ?? for you.. concerning an Apple macbook pro, and applicable schematics, there is an 820 - xxxx number associated with the laptop & schematic. where or how is that number found or determined? got a macbook pro A1502, opened the back cover (1st screw i removed decided to pop off the pentalobe..Aarrgh!!) found some blue/green corrosion on a corner of the battery as well as the BMS pcb attached to the battery. if the battery is disconnected, can other checks/tests be done with the unit plugged in? the unit will attempt to boot up without the battery connected? thanks again for your time and experience.
Ah, full disclosure I'm not very practised with the Retina MBPs. I need to sit down and learn that platform over the holidays. The 820 number will be somewhere on the board, but not sure where on the A1502. I _think_ they require a battery to be connected to start up.
Adamant IT ok thanks. i want to remove the "left" speaker (right as you see it when mb pro flipped over) & disconn the battery, plug it in, & see what happens. the corrosion is on the corner of the battery nearest to the corner of the speaker, & clean the speaker. thanks for the replies J i looked closely at the M/B (not removed) the inside of bottom cover/pan, & no luck finding the 820 #. will look some more. thanks
Yes and no. Nearly all motherboards have multiple secondary power supplies (5v, 3.3v, 1.3v, etc) on them that run off of a main power rail - but the main power rail setup tends to vary. Macs have a regulator on the main power rail as I show in this video (PPBUS_G3H), but a lot of laptops just run the charger input (19.5v) straight into the main rail. They still have an in-rush limiter, but that's just there to smooth out the stutter when the charger jack is connected or disconnected. Desktops are different as well because most of the secondary powersupplies are in the PSU itself.
Hey bro, I just wanted to get permission if I could take your videos and translate them into arabic (voice translation), bcz I really see that so helpful for people, and of course I will mention your name and your page and make your page as watermark.
I'd be ok with this - but I would suggest waiting until next year, I'm planning to remake Board Repair Basics with more modern information that applies to more devices. This series was heavily aimed at 2010-2013 era MacBooks and there's lots of room for improvement!
I trained to learn computer repair, back when we still had BIOS. That EFI is in charge now, was worth watching your video alone. Thank you!
Old but gold videos.
Since the "right to repair" movement blew up, I am considering to learn electronic repair at a hobby level.
Your videos just hit the spot for a complete beginner in anything electronics like me to actually try and stab my working components (carefully) to learn more.
Great tutorial! One thing missing in your tutorial is explanation of s5, s4, s3, s0 rails and when they are active. But this is the only video on youtube explaining power system architecture, and it's a big help for me. Your other videos on basic repair basics are excellent too, much better than most other repair videos out there in explaining things clearly. Thank you!
This dude rocks! I've been curious about electrons, protons, neutrons, etc., my whole life. I've fixed thousands of electronic devices, yet i still don't completely understand how it all works. Learning about electronics has always been a complicated, confusing, and laborsome process. Adamant IT however, makes it easy to understand cuz he gets straight to the point.
Very well explained ! I like short videos concentrated on one aspect of the subject. There is lot of documentation about the macbooks logic boards on youtube but most of them are strickly on repairs and it's difficult to catch up if you don't know the base to begin with. I know it's a lot of time for you dedicated to this tutorial but you will help many people to understand how these logic boards works and it will be easier to locate faulty components on these boards. Thanks for shearing your knowledge.
hey ,if anyone else wants to discover
pcb trace repair
try Saankramer Electronic Magazine System (should be on google have a look ) ? Ive heard some awesome things about it and my friend got amazing results with it.
I've been finding myself getting really hooked watching laptop board repair videos on UA-cam. I love troubleshooting, but always have to stop if I find that the issue is related to the mother/logic board because I lack the skills and knowledge to go any further. That's frustrating so I'm trying to understand how these boards work which'll hopefully provide me with the necessary skills to actually repair a board, rather than have to stop and say, "Nope, I can't fix it". I have 3 bad Macbook A1342 logic boards that I've basically kept laying around in the hope that I one day can actually fix one of them.
This series seems like it'll help quite a bit. It's articulated really well and in a way that doesn't make it sound too daunting/difficult to process. That's good when learning as I'd often watch other videos and while they are clearly skilled and good at what they do (repairing boards), they can often make it sound really difficult to get your head around.
Ditto. I've worked many hours and spent hundreds of dollars fixing an old car's AC system... and I'm being held back by a blown capacitor... now if I had the tools and skills to replace said capacitor, I could have already fixed the thing.
i have a defective logic board for A1708 macbook pro (waterdamaged) & was trying to repair it,before this i had watched multiple videos in this regard - but could not catch up with their explaination( poor explantion) but after watching you videos i am getting a very good understaning of the working bascis of mac motherboard- A million Thanks for explaining it in a laymans terms
love the way this guy explains things
amazing tutorials. one of its kind.! hard to find people like you. love from india
Well done! A very impressive presentation; as good if not better than a 'Tech-school' trade instructor. Thumbs UP!
Really Appreciate the tutorial as i am a novice but i am confident i will be a pro after watching your videos god bless you man!
When any one say to this guy bad commentary than i cant understand why because i love this damnnnnnnnn rightllllyy video , very very very very welll !!!!! THX :)
I love your series of videos simplifying electronic for beginners. Thank you
Excellent videos. Love your style of teaching. As a beginner I am learning so much from you. Thank you.
Me too!
Love your systematic approach
Great video, just what I was looking for, looking forward to the rest of the series
I love this series, hoping that i could learn more from your tutorials.
About to grind through all of these videos thanks for this amazing resource! Hope you get all the ad revenue bro!!!
Excellent way of explanation 👌.. everything looks so easy I can't even think of... Thanks a ton for educating us 🙏
Great video man, ive watched so many times its such a good base
I have a lot of homework so I will be absent until I solve it and Professor Graham allows me to return. Best regards.
Finally,, I found my way...🙏 Clear explanation 🙏
good youtuber with high performsnce keep it up
Thanks for the videos , have been watching board repair videos for years, can do all the basics, where would you recommend to start this as a hobby, are there laptops makes that easier than others for beginners to start with ?
Good video dude, very well explained.
Great lesson .. are you doing online classes sir..
very good work brother
Found something to binge!!
2:38 so that's why if you put a 1067 MHz ddr3 ram stick and a 1333 MHz ram stick certain slots on a board designed for only 1067 MHz ram, it will still boot. For context, if its done backwards or if both sticks are 1333 mhz, it won't boot. I'm guessing that's because the efi will initialize the boot on the 1067 mhz stick and once the operating system takes control of the hardware, its able to use the extra 1333 mhz ram stick at 1067 mhz. Its weird considering that you can use 1600 mhz ram in a board with a bus speed of 1333 mhz but not 1333 or 1600 mhz ram in a board with a 1067 mhz bus speed.
excellent turtorial
I do HVAC for a living, so far I can say troubleshooting a laptops is like fixing any electrical problems in my career
thanks for sharing your knowledge, i salute you
dude you are freaking brilliant!.. thanks for the videos
Excellent presentation, thank you.
Great Video! Can you do a graphics card, a motherboard, and a computer monitor series?😁
awesome video, thanks!
Great explanation!
Great video, like I am in school learning.
Great explanation 👍
I have already have designed 2 boards more complicated than a regular motherboard and numerous others for automotive and i still struggle when a friend comes with a motherboard and it died with no reason and there is no schematic available. i start with trying to find a datasheet of the main chipset and from there the power on sequence. it is something that if i charge for i'd charge as for design :) Now my first step is to see if all the mosfets are ok and most of the supplies com on with power good and enable if it is something more than 3hrs i just go on ebay and if possible order the same board and give it to my friend as a gift:)
Great Video. 1 Question, is the PP18V5 and PPBUS_G3H lines also found in Windows/IBM cloned based laptops as well, or are they labelled differently? Thankyou. :)
Yea most laptops will have a DC-in rail straight from the DC jack, which becomes VIN (Voltage In). They go by various names, but fundamentally do the same thing. The main difference is that most windows laptops don't have a buck regulator for VIN, it's basically just raw charger power. There's an Inrush Limiter, but no regulator.
the fuse just after the A/C power (coming in to m/b) is that a SMT component? great tutorial sir!
Yup, everything will be surface mount in a laptop. That particular input fuse is a very high rating, and is mainly there to break big incoming surges that might cause an electrical hazard.
Adamant IT ok thank you
thank so much this really helped
Well done, thank you
Which camera have you fixed to the adjustable stand for magnification?
Really helpful.
Question? Can you test the first stop on the line and the last stop on a line to find a problem with a specific rail?
Generally speaking, you'll get the same readings everywhere on a given rail. However, there is a technique for short detection where you use a super accurate multimeter (accurate enough to measure distance along a wire) to "triangulate" the approximate point of the short circuit. It's a very uncommon method on modern repair though.
Very interesting and very well explained.
Thank you so much.
I have an acer aspire 7600u AIO with the broken touch screen removed. The power button was a touch sensitive switch that no longer works as the glass screen is removed. I have downloaded the schematic for the motherboard HM77S01, but I can't figure out how to bypass that power switch. I had found two pins on the power switch board connector and wired in a power button, but that quit working immediately following win 10 latest update. Now the screen lights up for a view seconds and shuts off, and the computer doesn't even turn on
I have schematics of desktop motherboard,but there are no components number on the board like c500, r640, etc ,how do i know where components is located?
may i know the type of camera that u use to take a video of the board?
Great series of videos. My Dell 5559 won't turn on. When plugged in, charging light is on. Curiously, when I plug in the motherboard to test it I find that the area around the cpu heats up and everything in the power supply area is shorted and never turns off. All other power rails are off as they should be. No shorts in the main power supply. Is this an smc failure? Where should I look? Thanks.
CPU is low impedance and will appear to be shorted all the time. Am I understanding right in saying that if you plug in the laptop, laptop is off, but you have power and heat at the CPU? What voltage are you getting at the CPU inductors/coils when that happens?
CPU Vcore should be somewhere around 1v, so if you're seeing 19v (charger) at the CPU vcore inductors, one of the vcore mosfets has gone short-circuit and your CPU is probably been cooked.
@@Adamant_IT Thank you for your very prompt reply. Inductors are shorted to ground as are all caps in cpu vcore.
I have a concern sir, I have a laptop then it suddenly turns off on its own until it damages my OS. without removing a battery, it can still on but after 1 minute of booting, it will automatically turn off. even removing a battery, it is still the same, it will turn on, and after a few seconds or minutes later, it will automatically off. what do you think is the problem?
what macbooks is the logic board for so i can get a practice laptop/board
Need help. Where we can find any Board schematic?
Brother is it same for all laptops from diff manufacturers
Bellissimo!
hi , where do you download the schematics?
Adam, got a good ?? for you.. concerning an Apple macbook pro, and applicable schematics, there is an 820 - xxxx number associated with the laptop & schematic. where or how is that number found or determined? got a macbook pro A1502, opened the back cover (1st screw i removed decided to pop off the pentalobe..Aarrgh!!) found some blue/green corrosion on a corner of the battery as well as the BMS pcb attached to the battery. if the battery is disconnected, can other checks/tests be done with the unit plugged in? the unit will attempt to boot up without the battery connected? thanks again for your time and experience.
Ah, full disclosure I'm not very practised with the Retina MBPs. I need to sit down and learn that platform over the holidays. The 820 number will be somewhere on the board, but not sure where on the A1502. I _think_ they require a battery to be connected to start up.
Adamant IT ok thanks. i want to remove the "left" speaker (right as you see it when mb pro flipped over) & disconn the battery, plug it in, & see what happens. the corrosion is on the corner of the battery nearest to the corner of the speaker, & clean the speaker. thanks for the replies J i looked closely at the M/B (not removed) the inside of bottom cover/pan, & no luck finding the 820 #. will look some more. thanks
This might seem like a stupid question but do all motherboards get power like this?
Yes and no. Nearly all motherboards have multiple secondary power supplies (5v, 3.3v, 1.3v, etc) on them that run off of a main power rail - but the main power rail setup tends to vary. Macs have a regulator on the main power rail as I show in this video (PPBUS_G3H), but a lot of laptops just run the charger input (19.5v) straight into the main rail. They still have an in-rush limiter, but that's just there to smooth out the stutter when the charger jack is connected or disconnected. Desktops are different as well because most of the secondary powersupplies are in the PSU itself.
You’re good
Where you learned this thing ??
Thanks.... 🙏🙏
Sir need your help I have Acer aspire 5742 auto turn off system
very nice video good to lrn
Weldone
Us color markers to show how they are connecting.
What it means by SMC?
As i'd watched reviewed your video from the starts i got it finally what it means by SMC, system management controller. Kudos! well explained 👍
Hey bro, I just wanted to get permission if I could take your videos and translate them into arabic (voice translation), bcz I really see that so helpful for people, and of course I will mention your name and your page and make your page as watermark.
I'd be ok with this - but I would suggest waiting until next year, I'm planning to remake Board Repair Basics with more modern information that applies to more devices. This series was heavily aimed at 2010-2013 era MacBooks and there's lots of room for improvement!
@@Adamant_IT okay bro, I will wait thank u.
Hi Bob, how are ya?
TKQ
Wow
Please make an arabic subtitle for your video
where are all the engineers that i can pay to fix my PCB? i'm in london
I ccant understand
Sir pls send me
Voltage testing tips
On gmail account
"In OLD PERSONS' terms"???? I just subscribed in #1, I think I'll unsubscribe here!!
Can u explain why you posted that comment and the reasoning behind your negativity
Where can we get the schematics diagrams ?