iPhone 8+ stuck at 0% - Turns on but not charging after screen replacement By NorthridgeFix

Here we have an iPhone 8, plus it came in for no charge. Customer said the phone was working great, he replaced the screen and after he did so, the phone would not charge it does power on. As you can see, the phone is on I have a charger here plugged into an amp meter. Let's turn it on right. There we're going to plug the phone, give power to the phone. Okay and look at this.

We do see the battery symbol, which means that the phone did see the cable being plugged in. If you look at the amp meter, we see amperage being drawn 0.22, zero point. Okay, the phone went to sleep and MB and drawn by that meter is zero right now it went up to zero point twenty-two. So when the phone is on, we can see and Peter going up to zero point twenty-two 0.29, which is low, but right now the phone went to sleep and Peter is reading zero. The phone is on, but the battery is reading zero percent and the phone is not being charged before we proceed further.

I want to use the Tristan tester to see if there is anything going on with the charging, flux, cable or perhaps the Tristan chip, so it's plugged in, and we're going to test. This will tell us if the charging port is bad or that's, so we don't have anything going on anything wrong with the Tristan chip or with the flex cable. We need to take the screen of the phone and inspect the board under the microscope. So let's go ahead and do that now we're going to disconnect the battery first, always okay screen disconnected. Let's take a look at the phone and see if we can tell what's going on battery.

Connector looks good now right there. This is the problem. I see the problem, I see the problem. Do you see it right there? We have a missing MOS FET here, I've done a lot of those before this is the Q 3200 MOS FET, and this is needed in order for the phone to charge. That's inspect, to see if there is anything else wrong in this area and I, don't think so.

Everything looks good. I see two pads for the MOS FET, but the third one we do not know if this one is missing or not yeah, it's missing. So one problem we have here is: we have a missing pad and this pad is important. We have one two three, this one is missing and if we sold out the component, that's going to make connection with those two pads, but not with this one, and if we look at the board diagram or shorty in a minute board. Diagram shows that this pad connects with this side of the component, and it also connects with this pin on the battery connector.

So what we have to do is run a wire solder it from here up to right here and that we can solder the component over the wire, and that would be the only way to get this done. We're going to be using the enabled wire or animal Dwyer more like an insulated wire. The code on the wire will burn out when it touches heat, so we can burn the code on the tip of the wire where we're going to solder it on to the connector. It looks more like the wire that we use same thing, but this one has a quote on it: it's in a mold. We should be able to solder the wire.

Now we have a nice solder blob on that bin of the battery connector. So right now we do not care if this water touches anything on here. It's not a short out, so you're going to have to cut the wire right over here. Just like that, we can secure that wire down in place by adding solder mask. So let's go ahead and do that now right now, I'm gonna hold the wire down while applying UV light.

Okay, so the wire is solid. That's it solid, okay, very good, very nice right max. You can see how this MOS FET is very close to that DC connector. So we have to be careful very nice. So we have three nice blobs on here in a mold wires are sold on our website.

We still have it as out of stock, but we do have any stock, and we're going to update the shopping cart soon. We're actually updating the whole website, and it may take. Maybe a couple of weeks before we have the new site up current website that you see it's been on there, since maybe 2014 I haven't changed much on it. It's working perfect the way it is but right now we have somebody working full-time on it, and we're going to have a new site up I'm a web developer before I started the repair, business and I did web programming for almost eight years. PHP MySQL, jQuery, CSS I no longer have time to do web development.

You can check my Stack Overflow profile. I'll put a link down below I must have answered over five 600 questions on Stack Overflow, ranging from JavaScript to jQuery, PHP and all that good stuff. Few days later, we got the ports, so the MOS FET is soldered on nicely. Okay, so we're going to plug the phone in and look at this, it's showing a battery logo. That's good from before.

If you remember, when the screen is on, the amp meter would show 0.2 0.3 m/s being drawn by the phone, but as soon as the screen goes black, it goes down to zero amps right now the screen is black, and we are seeing 0.98 amps. So that's a very good indication that the battery is being charged and the fact that we have the battery logo on the screen is also a very good indication that the battery is being charged, so we'll see, I'm going to keep this on the bench for about 5-10 minutes, and I'll, be back. I got carried away, fixing another device and I forgot about this phone. Let's check it and look at this. The battery is in green color, which means that it charged.

Let's take a look under the microscope.36-Percent awesome, so the phone is fixed. All we have to do is put this back together, invoice and ship it back to the customer. Let me just quickly check the amp meter.0.90 amps is being drawn by the phone and look at this. While the screen is off now it's on. Okay and everything is perfect.

So that's it I hope you enjoyed this video, don't forget to Like and subscribe leave a comment. Have any questions, and we'll do something else in the next video.

Source : NorthridgeFix