About the motherboards .... (part 1)

good morning Friday yes and you know what's the time like ten past seven like seven on the morning I come earlier to do this video because tomorrow we'll have the live stream will speak about the terrible we have to speak of all the practical things you know so this is very important yeah because I will explain you exactly what's going on the modern world and on the end of this video you'll know everything about the motherboard here I have few motherboards here so let me explain you basically what we are doing here listen from the beginning here what I will tell you is work for me if it's not working for you is fine just just go over and you know just move over if it's not working for you but this is working for me for example let's say you're working flow is like one laptop per week on that case maybe you have more time to spend on the motherboard but that's not my case when I have like six seven laptops every day and like five six phones every day and they are not coming with like normal problem they did they already they someone try to fix them and they send it here based on that working flow here I have to go straight on the problem yeah if I can fix it I'll fix it it's not I just move on the next one yeah so please don't get this wrong because I'll know go I'll not go for example say fixing digital issue what is the release of data things no never now that's waste of time and I don't have that time you know but actually we are fixing things like power supplies like you know what no one is about data not there because we can't see enough nation and probably on that moment you will need schematics for what I am doing i don't iike Mattox because i know already what what this all the ships they are meant to do progress from experience and you have to learn that because you don't have schematics maybe we can find a market with hard cool you have to pay for and its proper long again you don't want long things you don't want know if you have long things you have to ask more money and that's not good for business yeah so let's start what I can see you know what I can't see what you see that's the thing I can't go back and see what you see but probably you see random things on a motherboard yeah let's take each motherboard I just use like random for motherboard from a broken motherboard so I can't see what you see and obviously you cannot see - I see but you can see what I see if you learn but I I can't I can't go back and see what you see so let's see when I see a motherboard yeah I'm just looking on the motherboard put me on some things here you know like pull your jump straight away and check the things like here here what we have here we have a nice chipset we have a processor Oh processor is missing chipset graphic chip we have the e any cheap you know does the startup chip we have some power supplies here this is another power supply probably this is audio because it's the rail tech signal on it this probably some audio amplifier power supply we can see quills yeah winsome all power supplies it probably this is some power controller power management we have a coil published from charging they have another power supply here now we have that two MOSFETs from the we have another power supply here probably three point three because this next to this one what do we have here the processor power supply and this power supply is two MOSFETs here put here so like for you can follow the path is a path so what do we have to do just follow the path you have MOSFETs you have capacitor you have the capacitor the electrolytic one yeah you have the coils that's a power supply yeah capacitor coil MOSFETs yeah coils MOSFETs yeah capacitors what do I sell I've show you this capacitors because most of the times the province comes from here from these capacitors let's go another log like this one say capacitors yeah these are on 19 volts and then also sent a they are getting are short here that positives here check here how many do you have here the positives here you see the ceramic capacitors so that's all you have to do to find the power supplies look here coil here the capacitor which is out on the voltage after the power supply down on the output sorry on the output yeah and on the back we have two MOSFETs and also have that ceramic capacitor here okay it looks like a pad here we have two MOSFETs same the capacitor and the coil on the other side there we'll talk about that so you see it's not hard okay let's put some power and start checking some things let's get the other model let me finish with this with the pad yeah let me finish with the part processor chipset about the whole motherboard SMC which is a starter chip it's a microcontroller you who read the BIOS the bioship we can see at the biochip what do we have here more here for some metal control because we have the multi coil here what about here you have some power supplies power supplies again you can see coil MOSFETs the output capacitor and the ceramic ones yeah reduce um you know all these MOSFETs they have a common pin and probably comes from this chip a is oh yeah here the same two coils and only two more spots it's easy to predict what these things are doing here now this is old one let me go on the other one different one this probably set the Shiva yeah eeny chip yeah the startup chip mocks a mix no does the bias I think that the air does the bias and here we have the power supplies they see too much first coil wealth output capacitor yeah and on the other side we have the MOSFETs and that ceramic capacitor yeah more power supplies yeah I think I have a video in this board and when of this capacitor was a short she does the power supply from the processor up or MOSFET the capacitors the output capacitor and the commander chick here everything is easy to be predicted here and obviously the coils on the other side any chip chip set Ross Esser we all take out the chip all the amplifier work on that Network Controller Toby this is challenging management chip put this on power controller here because yeah this is nothing obligated you have to read the modern book like a book this is different one also chipset Wi-Fi card I have no idea was that a big long chip power supplies this is the old one yeah so they will point to other way this one we can check and see the demo sets of the power supply ceramic capacitor output capacitor again most of here most ways here cores on the other side holds more coils which is old motherboards and I think we have a video with this one this HP a fix it last time and we found what do we found I don't do backup pass known on this side yeah not even this I don't know some capacitor here Afonso capacitor when here was a capacitor we can see the path here to MOSFETs well output capacitor and here is meant to be probably the ceramic capacitor like in video we have one here and look look the transistor II remember from the video saying first mode for the second MOSFET and from here we have 19 words everywhere I have the processor power supplies here probably this is from it's for the graphics because this is the graphics inside yeah ite chip which is the start of chip what about BIOS chip where is the bio probably is not bias for the boys the inside of that chip yeah it's not actually the biases and say here or or maybe not yeah probably it is easy here oh you know what let me find more motherboards these are all things and let's play with know things most of the board they have chip missings [Music] so let's go back so any mother would we have no vote on the vote on start up chip again I'll brush you here no it's not where I should put this inside of the chip processor here the chip board the chipset power supplies again you can see power supplies power supplies oh yeah on this one we solder the chief last time this one uh nice modern ball the graphic chips we have graphics yeah we have this thing on the graphics chip graphic memory chips the processor we have a lot of power supplies any chip you have the set of chip the bios is nothing complicated you see when you see the board with this capacitor on mixing from here from this power supply the ceramic ones are missing let's jump and check some things on the board between I think it was a board with the charging port yeah no processor let's plug this making a noise let me check with a pause of life is not on short 19 nice not or short something is making unless here rather than or what either bored yeah supposed to play they can't hear okay so let's start from what we spoke before from the charging port and follow the 12 volts power a ground is everywhere let me get this one it will grow from anywhere we don't care about the ground we created above the plus what do we have here 19.8 yeah 19.8 the next one we have a fuse here 19 and after fuse look this look you has a fuse nice and from here is going on a MOSFETs what's here is not common knowledge over here please come in here you see we have the two most fish on the settlement serial mode input output nineteen is going on this one again 19 and 19 on the output so all this voltage goes through these two MOSFETs like nothing like is nothing there maybe it's more easy for you under the microscope here and this is like a comma faint so all the relatives are the same you can see now minus plus first MOSFET lighting and output 90 input on the second one nineteen output 19 you can see I look at the pins there's no direct focus okay for peanuts together free on the output all together and one which is the gate yeah here is coming free pins all together it is the gate and here are old four pins together is this is the output here what is happening after that here after that it's not even point to follow the the the way the way the voltage from here because from here is going everywhere and all the motherboard so for example yeah let's take a pause supply if I take that power supply you can see the path the coil the output capacitor and the MOSFETs and the ceramic ones I told you on the ceramic capacitor around nineteen so you should have nineteen goes there I check if we have nineteen here and we have nineteen the other side of the capacitor is at the ground so you see so I have voltage here let's get another power supply you see these two again the part the coil the output capacitor the ceramic one ceramic capacitor nineteen another power supply here that's the processor line the part you have seen most of the time the person they have like four MOSFETs output capacitor on the other side we have the coils then you have the ceramic capacitor and you shall have nineteen here if you don't have on this side that means ground and you have another side now look we have nineteen yeah and trust me most of the time is problem with the power supplies not with the with the data things not with the data a communication No okay let's go back we check the 19 what I will do next Oh check the 3.3 that's the next thing what do we have here we have the e ne chip we have the bioship and the biochip I know on the bottom of the last pin is the VCC pin here the voltage so you see the mark on the chip here now let me go on the microscope microscope it's a wing bond by ship it's not on focus so you have later the mark where is the mark is the pin number one one two three four five six seven eight nine the pin number eight I should have three point three and I do have check on the multimeter I have three point three would obviously if I have three point three on the bioship I will have frequently here so I think my board is ready to be powered up now I will go on the on the on the ribbon cable from the power button yeah we don't have a power button is the one does the one let's check the voltage 3.2 I don't we finish the power pin well you know I don't care tribbles my funeral can happen maybe this mod what is working it's no processor here they have no led I'll know if it's working or not chip chips is getting hot either national processor here so I can test it so that's all what you have to do that here we have the power supplies they have this chip we start the older that those power supplies but this chip it's always under the power the brush in the same way she should have three point three because it's always under the power most of the problems comes from here actually from the three point three power supply and now you'll ask how do I know which is the three point three one well I have a case like one we can have same problem it's easy efficient design mode here that modded here you you put a pin on the pin number eight of the BIOS chip then you go on these big capacitors you know the output between the plus and C which is yours I was about to swelling this is the three point three power supply base not I shall have zero and I don't have zero so which is the three point three one see that's a good idea no policy three-point-three no idea what it is this side let's go on the other side the other side now does the processor call supply let's find a 3.3 because I can't find it 3.3 working with this the big transistor well Norfolk is this one supply chip mom mom no pictures all along if you already got a problem to find 3.3 power supply no it's not this one what is it it is my 3.3 volts power supply okay here I have two monsters the shaker okay see ya not it's no way to be here - all this fun is not the one objects one tunnel is it a weird one without MOSFETs on the and be lonely a chip when I flip I favor I don't think so I don't think so what does the problem find frequency power supply maybe it's coming from a diet and I can't find it if it's coming from my diet okay and it's not beeping can work with this one you know I have to hear the beep it's more easy with the beep on this pin I should have a pin with this and I have okay more easy with the beeping ring here is another one now this one now now now it's not down oh hell no good no no look we hit the beep you see on this case is with these don't have like a proper power supply as a chip but as we have finally put the three point P power supply here I'm sorry not from here from here from the this pin as zero zero zero does mean my power supply is here it is that chief so that is my 3.3 volts power supply and I have no query have nothing else this is a weird one usually it's a Mac or two MOSFETs so this is my Porsche but my 3.3 volts power supply where is it yeah that's on no it's not oh yeah it does one that's my three point people's power supply you know what I make this longer I make this this thing's longer like let's find where it is it what is it with the multimeter because was more easy like plot 19 volts and check where is the 3.3 yeah so I just try to put myself on your board if I connect now the 19 volts if I have a working 3.3 volts power supply is that is it check 3.3 so you can see we have three point three here of course if I don't three point three is something wrong with this chip you don't think just a bit worm does normal so that's the thing okay it's clear let's go on a different board now this is all Samsung charger I don't have a handsome charger this is the other power supply nineteen a solder the wires Russia [Music] - that's a samsung board it's not getting any power laughing that's good good okay let's check we have board that were there if it's on your desk but with value follow the path we have with the charging port now I need to find the two more sets a look this looks like a big power rail look how it is big one coming here - now I have to find a two MOSFET the two most as well okay so it's coming here we have some fuses coming here and from here could be coming here okay let's check with the multimeter 19 and from here here does my first MOSFET could be this has only one this is different four different schematics because it's our old board hope is not the same should be the same that's my power file you have 19 here and it's coming here you see this peak transistor okay it's coming on this MOSFET and four here is coming here and here we have the battery things so from here it's coming to the body some some resistors zero ohms so this is the MOSFET to charge the battery but it's not my thing so I have this resistor this is a current resistor so actually it's achieve here you see these two things come from here and here this is a current resistor and actually the poor management chip can read how much power is getting lapped oh why I still don't understand where are the MOSFETs so from here is going somewhere because I can see the older dots there is going the other side let's try to find the MOSFETs the massage can be this one oh no it's not that one where I've done schematics for that doesn't have mustard that - MOSFETs okay let's check if we have require three thus what we need we have the bioship the last we know cheap and actually have 3.3 volts the poor supplies they have 19 megabyte the support supply does another dozen others same thing the ceramic on the ceramic capacitors and we have 19 we know let me check you know I'm not happy with this I have to know where my 19 volts is going what this mean is mosfets I hope this is working this ha ha ha na is now coming here as along the truck is not coming here to probably hear it after the MOSFET and I will finally find them you have the coils coming here and from here now here now here it is with a big thing with the beeping is it easy mono here now no no not here not here what are my MOSFET here now monkey I don't think is though I don't think so this truck is going here in beeping and here well here this one is beeping can be movie can be how I choose the father what is old one it's all mother war I have the voltage there committee is working just because it's old one especially the poor BA old button poor mother I'm sorry here in her 3.3 KNC working it's on my phone is not spinning I don't know why light it's on on the touchpad you have the first two pins that's the power button so you can shut down this it's off yeah it's off and now it's on does not the idea fun is not spinning why I have voltage on a processor output output what I said about the output node is slower on the input this is the output little point on here we have the phone is not spinning what you are doing on the phone is not spinning what about modifying the things what about that is fun what you're doing when the fun is gone spinning again what I will make it spinning is getting one usually the easy way we get the red from the fun and you have to find a 3.3 volts it's not my case all the fun is spinning so what's wrong here - 2.3 yeah okay I get it when you're doing cut the red wire down and so good radware because obviously if this red wire probably is going somewhere and can short your things and short your 3.3 things let's play with fun again let's move the wire but not from there that's a bad idea to take three point three because it will be always on it was a bad idea 2.8 yeah the core is not for the fun it was a bad idea let's get 3.3 from different friends let's find another 3.3 a proper power supply will power supplies the 1y voice is too much high voltage so much what about this ones point probe noise not enough vote no it's not enough one point five no no no one works for either one one point five five is so much people free does raise paper revolt let's make the fan spinning when you're lazy you know you sold a wire so this is a property point three volts power supply this is a big one good the fan is spinning you see I try to give you an example how to solve some problems how to if you have like the phone is not ringing yeah now with the funny spinning and the GoPro is frozen that's crazy from how much time is frozen we didn't see nothing okay so we move the 3.3 volts here on this possibly the fan is spinning let's see fish the funny shut down when I will shut down over the bar yeah and the phone is off you see that's a good idea to reroute the things yes I found on a lot of motherboards the 3.3 volt I'm sorry the the fan actually the fun has a power supply it's not poor supplies like a chip like an orphan it's regulating the voltage on the fan and I have to reroute the fan like like here now the funny spinning is silent because running three point three if you put five volts will be too fast there will be noisy obviously this is a waste of time I don't know nothing about this motherboard is no RAM there and I don't care it's just to give you an example playing with the model was playing play with the motherboards this is the old one I can't go back in time and fix these things let's get another one was another old one this is an the old portable model world I don't even bother that's a nice one where is the child okay the charging port is here let's all the low eyes on the charging port this is a this is for spares so you can I can destroy actually the ground or is the Plus on on the CDC I'm on a diet that's - does ground the soul of the ground okay here you have two pins on the ground two pins on the plus ask around let's so little plus of course the other one is the plus they have two pins for the plus okay and it's taking like 10 20 milliamps as mean I can predict the 3.3 volt power supply is good let's take the multimeter this holes follow the power rail yeah both the closest MOSFETs are this one's from here yes it does the first one it will have nothing to do in my 19 the trackers are the trucks I'm not going there probably they're going on this side let me check me the multimeter we know even you know you know how it is it's not even going to bother finding the the MOSFET if you have 19 volts on the power supply the processor power supply we have the ceramic capacitors and we have 19 no it's not it's no point starting from the charging board if you have 19 there what about other chip the e any chip looks this like a biochip the last ring of the BIOS chip 3 point 4 volts so I have three point three I have 19 you know where's the power button summer it's on you see the come on what's going on with my GoPro sitting a scene of a the bodies on where they have the blue light here if it's on I can check the voltage on the power supplies what what we have here we have the processor one point one that's good that's good what we have more here power supplies well this one you can check on coils it is more easy so this is a 3 volt was this one is one for 4.2 I dunno from what is that one what about this one you know my my my meter can be okay what awesome why 0.98 oppressor on what about the RAM 18.3 even the chipset has a bias more power supply's predicts for charging 5 volts power supply came before the u.s. reports once the one 5 volts okay what about this one way point 4 volts we just find the 53.3 power supply what about this one 1.1 this is the RAM or maybe not maybe this one here does the ROM on 1.5 volts those on the other side you have the RAM memory Wow hot okay so everything is clear here it's not if it's not clear let's say your board is that come on let's find a 3.3 volts power supply yeah still working the Guru you know this I have to change the go ho I should buy the Sony the headaches r XV r VX 1000 - should buy that one ego on the diode mode even to find the MOSFETs here I need a beeping thing is more easy I have plus and let's see what is going going here now is not going to hear what is going to plus it's going here is going here so my plus is right here yeah here is a MOSFET from the output of the MOSFET is going where same thing it's going to here no right here oh no no what is going going on side of the world now yeah it's coming here this is the second MOSFET and from output of this MOSFET here from output of this more smocks what is going everywhere that I try to explain you here let's check to be sure let me have a post player on this side so from this MOSFET is going everywhere look is going this on this course applies yeah the arival I have I have like a big read the resistor here yeah is going here here we can see zero zero is going here plus zero zero here it's going here different power supplies zero zero so from that point after the second MOSFET here is going everywhere just follow the do the pole rail no it's easy let's get another model work a 3.3 volts power supply let's find a 3.31 yeah by ship the last pin oh no this one it is it hard you have to give the beep is more easy otherwise it's long well look it's baby here on this coil does mean here yeah this is my 3.3 volts pose no oh no oh yeah it is okay see just found it easy the last screen of the biochip plus zero and that's my quail does mean the MOSFETs are these muscles you remember we check the voltage already if you don't have the biochip let's say the chip is not with the bioship you go on this little startup chip it is line I and I it's a KB 9 to 6 but if you don't have look for the capacitor for around here capacitors check with the ground check for the be capacitors so does the does mean this can be the plus let's see it is you see I just took a capacitor and I found a 3.3 volt power rail I'll make sure so I just do the capacitor yeah because must be this ceramic capacitor on a 3.3 obviously and this and here on the last pin of the the bioship you see I have zero zero so here must be 3.3 that's how I 53.3 this one different this is some weird thing which is charging sure ok charger is here and you have no button ok this hasn't have a BIOS chip so let's check let's find the plus and minus on the charging port but this is grounded this is round the other one x plus around a block it's not taking any power good that's good that's good so what do we have now they jumpstart the power supply see if you have any power on it on the power supplies power supply is the capacitor and we have nothing that's good that's good we have no and you have like one volt so this is a full keyboard let's follow the power the power ok the ground just went off good good enough yes still working the GoPro I can let's check on the power supplies maybe I was wrong no still that we still did the first MOSFETs were are the first massage well something is grow up here was the transistor okay that's good my MOSFETs what are the MOSFETs no idea can be here let's stop the power supply and the ship with the beeping it smooths it more easy plus and they have few registers here okay where are the MOSFETs now now here zero here not here okay to weather now that's a power supply there were a small supply this is a cheap one no more space here now we have a worship there more are missing or something there are usually yes so MOSFETs mixing here what this is going every weight with welcome yet let me there is a like normal it's more much structure not trust me this is a weird one yeah this is a weird one that she was going on there plus the two resistors Garcon sorry the post-credits off here here it is going from here it's coming here something should be missing over here I choose in other words he's coming here or here I have no idea it was monsters are missing who they took them out and because of that I come find them now now I have to look for missing things near forget missing from here yeah you see that's sick when you try to do something with the we like board for space they try to prove a point we actually have a board for space let me get another multimeter this you know this is bad model on ground bad mode plus yeah and plus is coming here look zero zero after that is coming out here and it's coming in here zero zero we can see and from here is coming on this resistor which is like a current sensor yeah and it's going everywhere in the laptop to prove my point let's put here and check on the other power supplies let's see this one like this yeah follow the path the capacitor zero zero so you can see from here is going everywhere that was the point because the muscles are missing there I took them out and I use them on different things yeah let's just spend time wasted I wait anyway I will upload this video today again is Friday yeah I will upload this video and tomorrow morning 11:00 o'clock we have a live stream just tell me why what you didn't understand and I will explain you yeah probably miss things you know miss things which I know them but you know I I I'm assuming you know the Maverick already but you see this video and ask me about look on that minute and a second what's going on there make the schematics or something I will do it yeah thank you for watching like and subscribe the video I know this is a short video and just cover few things from the motherboards but I will do more about mother body see you later

Channel: Electronics repair school

Views: 169,898

Rating: 4.9267764 out of 5

Keywords: motherboard repair, fixing motherboard, laptop motherboard, motherboards guide, laptop motherboard repair

Id: XfIFLyrAsmM

Length: 77min 23sec (4643 seconds)

Published: Fri Aug 18 2017