Hi everyone
I want to talk about the boardview usage this is HP laptop it turns ON with no display I want to work on its board switch key is connected to this circuit with a flat cable as you see, there are many cables are connected to this board because I should turn the motherboard all the time while working, and to prevent from damages or disconnections I'll remove motherboard let me take it and check boardview to find pin related to ON/OFF switching key I have done it before but I want to show you with boardview too this is boardview you can see it both sides of the board you can see all specifications of components in boardviews while even IC names aren't written on motherboards there are no specifications and you can't track or find ICs you can find them in boardviews on back of the circuit in this part jack of the board that switch is connected to is in here by clicking on each of these parts, all pins will be shown and you can detect the pins -Is this the power flat part? -Yes, it is CN10 is the big flat (which was connected to small switch board) so we should find "Switch ON" pin in the specification list have a look, pin 37 it can be shown on socket by clicking on it this is pin 37 which is red it is Switch ON pin 3.3 volt enters this pin by pressing power button, GND and pin 37 will be connected to each other and then laptop will turn ON by soldering a wire and connect it to GND it will perform as ON/OFF key and it won't be disturbing for the next repairing process take a look at here, if I solder wire to jack pin directly, jack might get damaged some yellow circles might appear by clocking on boardview, that means all of them are connected to the specific part (now, the yellow circles are connected to this pin) make sure to solder a part that is the lowest risk (less dangerous) this is capacitor and it might get damaged this is the best part for soldering wire and to solder wire: you should solder it here and tighten (fix) it so it won't be removed due to movement I'll show you what I did on GND so this wire plays a role of ON/OFF key I tightened the wire here this is the part that I showed you on boardview I soldered the wire and tightened wire by connecting pin to GND (whichever GND), switching takes place so the 2 small boards and flat cables out of use so the 2 small boards and flat cables out of use so it would be easier to work and repair motherboard so this was one of the boardview usage you can easily find the part you want to solder wire (as switching NO/OFF key) it would be harder to find this part in schematic let me tell you another usage of boardview this is Asus motherboard it doesn't turn ON and is completely OFF there is no schematic for this motherboard take a look at motherboard numbers of all components are not written only some components' numbers are written (jack,...) and the main and important components (ICs, MOSFETs, inductors, capacitors,...) don't have numbers it's really hard to work on these so using boardviews can very so helpful in repairing what should we do in a situation like this when laptop is OFF and there is most probably short circuit?! there are 2 ways: We can check volt or ohm but we don't know which components are related to what blocks for example: which inductor is related to 3 and 1.8 volt where is 1, 1.05 volt and which one is 1.5 volt? you can detect components by looking at them and by their appearance for example PWM near RAM block might be related to RAM voltages or PWM near CPU might be related to CPU but you can refer to boardview to diagnose components accurately and by clicking on each component (inductors for example), you can see their numbers, voltage and also you can find out which part they belong to I'll show how to troubleshoot motherboards using boardviews in the following I'll show how to troubleshoot motherboards using boardviews in the following this is boardview as you see let's zoom in by clicking on each coil, (let me zoom in a little) "PR803" is the name and "VCCIN" is its input voltage let's check another component, this capacitor -which block does this capacitor belong to? -it's related to VCC take a look, names of all ICs appear this is CPU and this one is graphic chip RAM module jack and these are the near ICs you can even detect jacks this is DC input jack pin 1 is input let me zoom in you can click on each pin and see the specifications pin is highlighted in the list as you see, pin 6 is GND let me click on a pin on the list (pin 1) pin 1 will be selected and shown on boardview this is input of adaptor voltage you can click on wherever you want in boardview and see their specifications for example you can click on ICs this is U3401 IC you can see specifications of all pins on the list which can be very helpful in troubleshooting motherboard I want to show you power blocks there is a coil in here you can see specifications by clicking on the pins the pin is highlighted on the list it is +1.05VS the yellow parts on boardview are connected on PCB board Sorry for the notifications :) all the connected parts in motherboard are yellow (yellow parts can be in different or other parts of motherboard) related parts would turn yellow even if the related parts are far away from each other related parts are not here for example you can see EC IC in here U3001 all pins are shown in the list on right let's check if voltage is present in this IC or not! pin 26 is 3VA EC the red pin is pin 26 (the pin I clicked on it) and the yellow parts are connected on circuit so if you want to check voltage or ohm IC pin might be disconnected by placing probes on while checking voltage or ohm, you can check voltage of yellow parts (safe) (which are resistors or capacitors) I want to talk about another usage of boardview as I said you can use boardview to detect components you can see positions of components you can see how pins are connected to each other, on both sides of motherboards using boardviews for example J5001 Jack it is related to fan and its pins are shown in the list by clicking on a pin, you can see the connected parts (yellow parts) you can see GNDs of both sides of motherboards you can see GNDs of both sides of motherboards it can be seen easily let me say something about boardviews you can see block of each component in here you can find different voltages for example 3VA_RTC yellow parts are 3VA_RTC 3VS so you can easily find the blocks in this way there are many things in boardview which can help you I talked about them practically as you know there are different modes in different menus of boardviews as you know there are different modes in different menus of boardviews you can also use it, when a component is burned and you can't detect IC number and motherboard schematic is not available in this case, so you can use boardview and click on components you can see IC number let me show it with an example I click on memory these are the pins and this IC number you can click on components and see their specifications this is component number I want to show you a problem hard disk can't be detected some times laptop turns OFF, when working with the laptop and moving it, and hard disk can't be detected I checked the motherboard and this connector J6801 which is related to a small board that is connected hard disk pins of this HDD connector are disconnected, and because of this problem this problem is caused because the other side of board was heated many times this is Bios IC which is replaced a couple of times and the problem got worse and destroyed this connector and the pins are removed I'll show you the removed pins in boardview and this is the other usage of boardview I find connector on boardview J6801 all pins are appeared when I clicked on it I checked ohm and realized many pins are disconnected including pin 50 it is disconnected from the bottom of connector to the PCB board which is 5VS (an important pin) hard disk won't be detected as this pin is disconnected another pin is pin 47 it is data signal direction on board and see which part it is connected to let me zoom out and show whole motherboard it is not connected to in this side I show the bottom it is connected to CPU and the pin is connected to pin 972 of CPU it's the data which is transferred between CPU and hard disk other pin of connector was also disconnected pin 45 was disconnected this is the direction of CPU and hard disk as well you can see on motherboard CPU is highlighted again and it is connected to pin 994 of CPU so this specifies the problem completely disconnection of data and voltage direction is the reason why hard disk isn't detected the boardview can help us see and track the directions we can find the related components of blocks on boardview we can find the related components of blocks on boardview and troubleshoot the problem I should say that this connector can't be repaired because the motherboard was heated too much if it was fixable we could have connected wire and solved the problem but in this case it should be replaced thanks for watching :) Produced By: Dr-Bios.com
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