Definitely not in terms of skill, but doing my best to show people what's out there and motivate them to have a go!

@@Adamant_IT your skills are pretty amazing considering you are repairing all kinds of laptops/stuff instead of focusing on a few specific macbooks !

There's one in the works, yes :)

Y'know I didn't even notice, I thought the M.2 drive had been pulled by the customer, but now you point it out, it booted right up... Good future upgrade for them then!

@@Adamant_IT i'd be more upset at the single channel memory.

Gaming laptop with hard drive? Obviously not a serious gamer!

@@Adamant_IT My Omen has 2 drives; an m2 boot drive and a mechanical d: drive. It's under a metal shield. Full blown graphics and 32Gb . . . it does the job.

@@jed2055 mechanical drives is not even normal in 2023....only cheap laptops get them....my lenovo legion came with 512gb nvme...and a second 2tb nvme...with 32gb ddr4 ram

dc resistance is impedance

@@enginstud8852 Odd as i've always seen impedance as a complex value, not just resistance. Should i shoot myself now :-D

@@zx8401ztv Impedance is the generalisation of the concept of resistance, DC resistance is not dependant on frequency, but the resistance of a capacitor for exemple depends on the frequency of the signal,and a simple real number is not enough to contain all the information of impedance (module and argument of impedance are 2 informations stored in 1 complex number) The impedance of a resistor can be stored in a real number and is equal to U/I

Yup

True, but all diodes exhibit some form of reverse breakdown, it's whether that's at a useful voltage that matters. Also that diode is there to kill a reverse polarity supply in case a wrong charger is used (though these days almost everything is centre positive on the barrel jack).

The fuse analogy was a little clunky... what I meant was that it's a sacrificial part that's designed to fail during a fault, in order to protect the rest of the device. To get a true answer, you have to remove the diode to test it - but there's not a lot at DC-IN that connects the positive and negative terminals (until after the inrush limiter) so a short on DC-IN has a very good chance of being the diode.

Looks like it got very hot at some point. Maybe check out the power brick?

Doing a test. Algorithm hates me right now, so I'm seeing if a content-dump will give it a kick!

Yea I kinda when with my gut on this one, as hot chargers are pretty rare in my experience. Absolutely right though, would've been easy to plug the charger into the disconnected jack and measure the voltage to make sure it was all normal!

They were on ASUS right?

Yea... tbh I don't know how much of it is hogwash. Like, did B&O actually supply/recommend the drivers, or are they just the speakers HP would've used anyway, and they paid B&O to leverage their brand name for a more premium look... Have seen all kinds of audio brands written on laptops over the years.

@@Adamant_IT Yeah I'm familiar with that practice. My Lenovo is with JBL, but find them awful tbh. :D

More or less, but let's face it, there was a time for all of us where the motherboard was a single mysterious circuit board, and if there was a problem with it, you're done. I'm not in the same league as the big name board repair crowd, but as someone who a few years ago was a swap-service, hopefully stuff like this can show people where to get their foot in the door.

Just a gap in the wrap. Nothing to be concerned about 👌

I'm not sure what the second one is for, seen it myself as well. At a guess, I'd say it might be the EC Firmware, but that's purely a guess. Certainly if the 4MB chip isn't retaining data, it sounds like replacing it could solve your issue.

@@Adamant_IT again thanks for replying, after searching and searching i learned that my bios is actually of 12MB and is splitted. And the ME is of 8 MB and the BIOS is on 4MB flash. Then i was unable to find 4MB flash anywhere so i was thinking if i could use a 8MB flash and write 4MB dump on starting of the flash. But i was unable to get that delivered also, at first i was just using the clip on connector to write to the flash and it was always missing the data. Then today i simply desoldered the IC and soldered it directly to the programmer, and this time the chip took all of the contents. I took the dump again and compared the data and it was identical. But when if resolderd the IC to the laptop again it still won't boot and then i checked the chip was missing its contents once again. I'm so much confused right now. Laptop does nothing with battery connected but when i connect AC and press the power button it starts up and runs the fan at full speed, no lights on the laptop and the only way to turn the laptop off is to diconnect the AC power. [Edit] I was able to fix my laptop had to flash both of the ICs and don't know why but i have to desolder both of them. Not gona lie, I have learned many things from you. I have learned alot from this experience and I also have to finish the documentations which i downloaded for this. Assembling my laptop now. Thanks and have a great day.

Ye I checked it at 6:00 just in case! Another possibility is that the diode blew when the old DC jack failed/broke, but it wasn't until a new jack was fitted that power actually flowed and then smoke happened.

Lian Li LAN COOL II, I reviewed it not that long ago if you check back through my uploads!

agree

It depends on the rating of the diode. Most laptops can handle a "hot" charger, and the in-rush limiter will block the voltage if it's too high. The diode is there to bypass a voltage that will kill something in the laptop. If there's lots of amps, the diode will probably get blown up in the process - but that's still better than blowing up the mobo.

The charger never 'delivers' more amps, the current drawn is always controlled by the load. Current I = V/Z where Z is the impedance of the load. Of course if V goes up or Z goes down I gets bigger, but you cannot 'force' current to be more than the load wants to take. If Z is very small but the source has no current limiting then I can get very large at which point something melts, ideally a fuse, but could be the wiring or a PCB track. That could be what happened to the original DC jack as a sacrificial part.

You might get the new-style Gigabyte BIOS interface, but I don't think you'll see any useful feature improvement. In my experience, there's not much change in BIOS updates on Intel platforms, so I tend not to bother updating unless there's a specific reason or bugfix. By comparison, AMD BIOSes have the AGESA firmware in them, and updating that brings in performance improvements. So on AMD it's worth staying up to date, but Intel kinda polish their BIOS before release and then leave it alone.

@@Adamant_IT many thanks

Its a YZH from Amazon good little tool