Laptop No Power - Troubleshoot Only - Lenovo Yoga 900-13ISK By HealMyTech

Today we're going to talk with this laptop, which is not turning on when you press the power button from the side. There are no signs of life, no LED lights and no fan spinning. Let's check it out hitting tacks and welcomes this for mine. Taken on this channel I will help you improve your relationship with technology, so finally subscribe button, click on it and click on the bell icon to go from newbie to techie, also Amazon after it links in the description below will help out the channel. So this is the Lenovo yoga, 900 ?, 1 3 is K. Please accept my apologies for the setup.

I normally do this top-down filming style, but since we are on day 2 of the lockdown in UK I'm at home, I've had to bring whatever I could grab. So my setup is not ideal right now to troubleshoot a Lenovo laptop or any laptop with power issues. It is not different tutorial, shooting a desktop with power issues. We've said it many times, and I'm going to repeat it. If you have power problems, you deal with power before you think about motherboard or Ram or processor, or anything else.

Of course, you've got two contact points for power. You've got at the back, which is gonna, come from your mains convert into DC through your charger into the cable, and then you have DC at some point on the motherboard entry and, of course, you've got also the power button at the side, which potentially could be a problem if it's broken, if it's not creating contact now, just to show you my little setup, I've got a digital multimeter which will come in handy data link below I've got a phone which will become evident while we have this right now, and I've also got another type of USB cable, which is just for normal Android. This is a standard one, and I've got this little gadget, which is a USB tester from Amazon, again link below I'll, explain what that means. Now, traditionally, if you were going to test a normal laptop standard laptop with a power problem, I would ask you to grab your multimeter and test for this voltage at the pin, which goes into your laptop, as you can tell, and let me zoom that in because this is one problem with these propriety designs. This is a USB charger and if you can see on the side here, you've got a little kind of edge triangle pointing whatever.

So this is not standard USB at all and the port is the same, which means we're going to have a problem trying to test for DC voltage here. I do not have the schematics. The next best thing to do is to try and test all the entry points from the charger onto the motherboard. And how do we do this few ways we probably better way to do this is to grab yourself your multimeter, and we're going to plug in our USB into the port. Okay, and what should happen? Let me focus that in so.

This is the cable for the DC entry point, and there are five pins here and pins number. Three and four is red and black, so that's the positive and negative, so we're gonna, try and measure DC voltage on pins number, three and number four now I'm kind of speaking a couple of steps, because I normally do this quite a lot, but you should really be thorough and if you followed my previous tutorials, you should really test your AC voltage first from the mains, if you can be okay, but I've already done that test. So we're gonna straight to DC today, and we would use this little multimeter here, and this is AC. We put this on DC right now. What I'm doing is I'm testing for DC voltage at pin three and pin four.

If I can see this as three and that's four and like you can see on the multimeter, we are not getting a correct, DC voltage. Alright, it's all over the place, but we're not getting this evolved. And how do we know what this is? What we supposed to get now on the charger itself. It will tell you usually, if you have a look put a picture later on. You may not see it, but it's giving me supposedly DC output as 5.2 volt and two amps. We can ascertain from this since we're not getting any voltage at this point.

Okay, at the entry on the motherboard, there is a big chance. You've got a problem on the DC cable or this USB cable or the charger cop. We got three components now a little history on this. The client actually did already buy a replacement charger with the cable and that didn't work. They also bought another battery to replace it a brand new one and that didn't work.

They also bought a brand-new motherboard and tried to replace it and that didn't work. The only mistake they did was they actually bought these components separately, and then they returned these components. One at a time except for the motherboard, is still here, but I've done this test with this charger cable with a new motherboard, even with nothing connected nothing plugged in including removing the battery, and I'm still not getting any DC voltage at this entry point here, so I'm pretty confident. That is not the motherboard issue. It is highly unlikely, but not entirely impossible.

So what I can do at this stage is to show you this little gadget and explain that this is a little USB test up. It should, in principle, give you voltage and amp reading, so we're gonna a little test. So if we connect the charger back in alright, and then I'm going to plug this little gadget in first link for this for Amazon again in the description below, and then we are going to connect the funny bit into the port at the back here, and then we're going to connect this into these spits. Okay, that's a normal USB port, at least as one bit as actually normal and now what I'm getting as reading is a voltage reading DC, if you can see it, says 5.5, but I'm, not getting amp. Those triple-digit on the right should be M voltage, I'm, not getting amp.

So it's giving me DC, but not ampere, which possibly could signify that the charger isn't well enough or good enough or strong enough to give me amp and that's a very common problem. So we can test this if we grab a normal low powered or any other device. USB powered like a smartphone, and I'm going to grab. Another cable, because always a contest with this cable is proprietary, so I'm going to remove that, and I'm going to plug in the normal USB, cable, and I'm going to plug in a phone right. So, if I plug that in I'm getting charged on the phone, can you see I'm getting charged in the phone yeah? And what about the reading right now, I'm getting a reading both off of DC 5.45, and also I'm getting amp 0.96. So what we've done here is to confirm that at least the charger has enough juice to power a low device.

Now this is not a Hun percent accurate that the charger is actually delivering two amps for this laptop, but at least it's giving us some form of confidence that we are doing something to test for current okay. Now, the problem is that we are in lockdown and I do not have access to other types of equipment, including another charger at this stage. So I currently test for that. But we're going to assume, hopefully with certain level of accuracy, that the charger works so which leaves us with potentially the USB cable, all this DC cable. Now again, unfortunately, I have ordered a new DC cable, but I could not get the right.

One I try to send the seller a message to confirm if it's the right, D CK with the right pin array, but they could not confirm back and the client wanted to get the DC cable anyway, so we can test it. Unfortunately, it's not going to happen. It's a wrong DC cables, so I'm left only with this cable and I have ordered another one and, unfortunately, again we're getting the same reading even with the other brand-new motherboard. The only thing left for me to tell you is that this cable has a very funny shape and inside the cable, there are actually six pins on each end and if you consider me turning this way, I'll show you picture later. There are six pins, so I did it continue to test with my multimeter and the only reading I'm not getting is the middle pins, which is going to be three and four on each end, unless I've done the reading and the test incorrectly, but I'm not getting reading on pins.

Three and four, however I'm getting the same result with the other cable now. Is it possible both cables? It's problematic, you know very unlikely, but not entirely impossible again. At this stage, the only conclusion I can give. The only thing I can suggest is if I was in the client, shoes, and I'm going to have to give back the laptop tomorrow. We cannot continue the test because of the problem everywhere with the lockdown is to order an original charger from Lenovo, because I think what they did.

They ordered a compatible one, not then original one, and also to order original, cable, DC, cable in from Lenovo themselves to test. The other thing I would request. Is that if you do have this problem, you should get in touch with the manufacturers directly and ask them also for schematics for the motherboard and even for the cable and now some conclusion, okay, I did put this problem on my social media platforms and I also asked a couple of other professional electronics engineers, and they have both confirmed that this is a correct, troubleshoot and diagnosis, and they're, also suggesting perhaps the charger hasn't got enough juice, maybe, or it's a problem with the cable or the USB cable. Unfortunately, we cannot carry on the test to find a fix, and if you are in this situation, hopefully outside this lockdown a period, please make sure you order the correct stuff from Lenovo and check with them. Now what I would advise? This is a little of pet peeve, and you know my feelings about laptops generally, especially when you have these very silly proprietary designs.

This is something which I feel is a very disheartening thing. Is its almost like for me daylight robbery? This is my opinion. I do not advise that you guys get proprietary design, computers and laptops. It's unfortunate because you stuck with them and especially this kind of models are discontinued, so the support for them is not great, if non-existent, just why some people are trying to lobby for a right to repair which I highly encourage everyone to get on board with, because manufacturers cannot keep treating us the way they do if they sell us something. We have to include availability of spare parts, give us two Matt ox and also full tutorials on how to repair our own devices, because we've bought that.

Let's hope you guys can get on board with this little project. So thank you so much for watching before you go make sure you watch these other two videos on your screen. This will help you improve your relationship with technology. Don't forget to subscribe. Click on the bell, icon use my Amazon, a few clicks and I will see in the next one the next time, peace out you.

Source : HealMyTech