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Great Video Graham - hope you guys enjoyed coming up to my part of the country and visiting RMC - do you get a chance to talk with Neil?

seeing as I'm seeing comments all surprised that this works...my mind's kinda blown, i just ordered splitters thinking i needed them for my lighting setups

Good one 😊

Just fixed my xps 15! All voltages and symptoms were the same! Thanks a lot

You might have had a different amp reading if you put the pins across the break in the wire.

Great video. 👍 Though one thing puzzles me on this particular laptop is: The BMS handles the battery side of current, data, and clock sense pin information, what IC handles the motherboard side: The PCH?

You don't have to brute force find clock/data. They both have a zener diode on the battery side. So if you put red probe on gnd and find a voltage drop of .7V or .8V you found data or clock. That narrows down the brute forcing.

Issues with Dell laptops; sometimes the charger itself is faulty and does not change the battery.

Strangely enough, every Latitude 7490 I've seen (and it's been quite a lot), I've had to replace the battery, as it's turned into enough of a spicy pillow so as to push the bottom of the laptop apart. It hasn't happened on any other Latitude I've seen, only 7490's (and a handful of 7390's).

Watching this on a Dell Vostro5568 . 👍

"I've changed multi-meter, there is a fuse blown in that one" "Now lets measure the current" Completely unrelated sentences!

Very interesting video. Such an odd failure mode. To me the trace didn't even really look burned, more like a physical incident. Bit of constructive feedback: at times it was very unclear to me which battery is connected at the moment (when you were measuring the sys detect current). Just clarifying each time which battery you were connecting would have helped a lot. Also I would've loved to see what would've happened when plugging in the old battery after fixing the trace. Although I get that that's a bit risky. Keep up the good work! :)

Always a good sign when it doesn't catch fire!

A very interesting repair good job.

Great work as always Graham. Thank you

As always, a really good video with you explaining along the way. This in particular was good because of your in depth explanation of the communication between battery and motherboard. One more thing you have that some other vloggers lack and that is humility. You are so humble despite your knowledge and ability to explain. Keep up the good work and cheers to you and your team. Best regards Magnus

How many latitudes did Sy sell while you were busy with this repair?

Wow see all your production team and even caredog!

I had this issue on a Lenovo legion 5 just opened the device disconnect the battery and press power button to discharge then reconnect the battery and it started charging and using the battery!

I saw that battery tester and thought I was watching Sorin!! Nice job!

when looking for interesting videos to make.. you can buy this "USB killer" dongle and zap some laptops. it would be interesting to see how badly damaged/repairable they are after that treatment. even old ones. ;)

Maybe what happened is actually that the battery was connected and disconnected for some reason in the wrong way otherwise it doesn't seem to make sense why track blew up like that. Great video Graham!

Great explanation of the system/battery presence signals and demonstration with the battery analyzer. Just a note, on the schematics R4310 is a series resistor, the pull-up should be somewhere else before that. Burning the trace would have required several amps going through it, it would have burnt the multimeter fuse (at least in mA/µA range, but if the current came from the battery it'd probably have exceeded the 10A of the A range as well) before you could take a reading if the issue was still present. I'm not sure what happened though, maybe someone tried to unplug the battery with steel tweezers and shorted something inadvertently or dropped them on the board. If the battery rail actually got sent there I'd suspect the BMS to be damaged as well. Also, I'd have soldered a very thin and small wire just to link the burnt trace so that it could burn again if there was still something wrong. With a thicker wire you run the risk of something else burning, for example a via which would burn the PCB internally as well. (here there's still a decent length of thin trace that could burn but you never know)

I was there when the sausage was made! Great honour!

love the video

Great repair video definitely one of my favorites and hello to Sy, Muerto, Carradog and especially Catriona.

Good morning

Hey. It would be nice if you could make a new version of that system maintenance/troubleshooting/windows clean up video that you did a while back. It was very useful, and really needs an update. Cheers.

oh that is what you were doing on Saterday night boozing on hahaha good fix to by the way

Might have just been corrosion too, the resist looks to be missing rather than burnt off. Sometimes on a pcb the copper can be contaminated right at the beginning of manufacture.

Excellent content and another laptop fixed and back in the hands of the customer, what a great crew too, especially the guy that stands around holding a fire extinguisher just in case of IGNITION

why does the battery have 3 positives and 3 negatives and not just one of each ?

i love how one of the team has a fire extinguisher 🤣

quick question about bateries mr graham, how thrustfull is the reading of "batery health" on a simple software as batteryinfoview? i replaced the batery on my laptop and in just a couple of days it went from 100% to 82%, and im starting to doubt about the "new" condition of the new batery

Great team, except for Carry Dog of course 😂😂😂😂👍

not all *.exe files can't be extracted by 7zip alone.

what if the eprom you are interrogating actually runs on 5v like most used in instrument clusters on vehicles

I can understand everything you say and, on the other hand, learn how to repair. Thank you.

Anyone know a reliable battery source in the US? Thanks in advance.

You are a life saver!!!!!!! Thank you. I downloaded Signal RGB to be able to control everything and it messed up my PC badly. Now with Open RGB i have exactly what i needed with the help of L connect for my fans.

Hi, do you also carry out revisions or repairs of motherboards on commission?

Learning over money

The problem with youtube is we get a game of telephone when it comes to the actual science of resin safety. It's nowhere near as dangerous as most will have you believe, but many creators will just parrot what other video makers are saying. The studies on the manufacturer pages are often much more accurate and they are required by law. A random youtuber will often have a sensor or a measurement, but not take into account the environmental conditions and other sources and harborers of TVOCs. Anyways, a hotdog is gonna kill you way faster. Enjoy life. Good video btw

Just change the sensors by peeling back the green tabs

Appreciate your videos! I got a MacBook coming my way with the same issue, hoping it’s this easy.

Wait I’m confused. You soldered the chip to the breakout board, then swiped it away from view. Then you cut to your programmer, but how are we supposed to know how to connect the breakout board to the programmer?? Or, do I have to watch your other videos to figure that out? Thx

Thanks a lot for this video.But be very carefull because i forgot to disconect battery and in the end I was struggling connecting last to cabels and accidently i touched a something with one off the cabels and saw sparks and smoke and feeling like my mac is gone.But i turned on mac and everything was workingThanks a lot for this video.But be very carefull because i forgot to disconect battery and in the end I was struggling connecting last to cabels and accidently i touched a something with one off the cabels and saw sparks and smoke and feeling like my mac is gone.But i turned on mac and everything was working.What a release. Thanks a lot

dont turn it on take it apart

Where should I buy the hinges from

Just picked this laptop up locally for $40 as it has the same problem . Good thing parts are cheap for this unit.