Smart

I do so,can put more voltage

so like soldering a wire to the ground and to the coil? but what part of the coil? in between mosfet and coil or inbetween coil and cpu/gpu and such?

Could you share any examples of this ( video, etc.)?

I guess the only argument against would be that if you incorrectly identified a low resistance-to-ground inductor as a short, and then fed in amps, you could cause a fault on a good rail. But like most things, experience will help!

I had the same issue too, laptop didn't even last for 2 years damn shame, the thermals were shit too.

Bigger fish to fry than mere rgb.

There is no lower mosfet, those are dual mosfets, two mosfets in one package.

@@electronicsrepairschool nice one if dual mosfet, by the way why u not connecting your laptop charger on DC bench to see the ampere what going on

I just cant remember anymore how much precious time of my life was wasted on AMD and Acer products. Since the 'great' K7 toaster.

You are right. I just tried to repair friends expensive gaming laptop with short in between layers after driver blown (maybe something else as well, it was at pc specialists UK for repair, they unsoldered many parts) 19v rail short and there's simply impossible with Dremel, so many cells and very close each to other 😅

​@Arthur how much did somthing like this cost your friend?

pfff.... that's the easiest part....I never went home thinking 'hey, I should've tried this too' or watched maniacally videos on UKposts about finding sorts or kept thinking about it until I slept and ended up having some tech-geometrical themed dream.... never happened...

Hahaa, i understand but the truth is, the thermal camera made my life easier :D

​@@electronicsrepairschool yes, I fully understand. It can save you hours of work.

It's a capacitor! I can't believe.

@@OnStageLighting I cant believe, this is crazy

@@martinharmath1566 the customer got lucky. Usually these gaming laptops are tricky.

Heat is a factor, yes, but it could also be stress, those MOSFETs are switching very fast while dealing with a considerable high current so stress can also be a factor. The datasheet has info on how much heat the component can tolerate and considering that there is very little ventilation inside a laptop compared to a desktop they have a high likelihood of dying, especially on gaming laptops, more powerful chips means more current, more current means more heat and so on. In that sense, yeah, lowering the fan speed to lower the noise means more heat so higher likelihood of those components dying.

Just having a coffee :D

Sigur ca se poate, dar nu cu statia aia de aer cald si atat si sa mai si mearga.

Sunt convins ca il face si cu statia de aer cald, la ce mana are. Nu renteaza insa. Mai simplu repari placa donoare.

Cpu removal requires a specific machine that heats the entire board evenly and safely and makes the cpu easier to remove, but most technicians can't afford it because it is very costly and not economical

the coils outputs are connected together to the cpu or gpu ,wouldnt they show the same value? you can actually come with power supply black prob at the input coils instead of the board ground and red one in 19v output caps to identify the shorted mosfet( gets hot) that way you are 'cancaling' cpu or the load from the circuit.

hmm... i dont know, maybe it's depends on damage level (of cpu/gpu), if it's not too high, then only one line will be shorted? i'm guessing, someone can correct? in that case voltage on (cpu/gpu) coils will be same (or greater than zero) or it's depends?

That's a good question! Both CPU and Power Mosfet can be the reason. We know that current is high in the circuit. Perhaps Mosfet itself had some defects during production and was overstressed during normal operation. The same is also valid for the CPU. With enough heat and time silicon will fail. We don't know if cooling system was in fully working order. Perhaps this laptop had overheating issues.

The mosfets shorting is a pretty common problem on damaged laptops. We see CPU's in PC's don't really have this issue. I'm guessing the mosfets enclosed in such a small space with poor cooling leads to there failure. I think the CPU failure comes from the mosfet failure.

@@anthonydenn4345 I have few cases whit shorted high side mosfet in desktop mothrboards, but never was the CPU damaged after that. Of course 12V ATX supply was applied directly to them, but survived. Maybe the ATX supply is quicker to disconnect the power than these laptops, don't know.

well, i have seen a lot of coments that acer nitro is a expensive heater...

I just had this happen to my laptop. Was watching this video to learn how to diagnose before deciding next step. I wasn't even pushing my laptop hard or in terrible conditions and it just happened. Laptop wasn't particularly dirty. I'm wondering if maybe poor thermal paste or otherwise is not pulling enough heat. I am not experienced enough to discern unfortunately.

Yes

That is supposed to be like that. That's normal

My advice is to watch all Sorins videos, get some broken laptops and start repairing.

Sorin has a lot of videos that can help you get started

dont play any game in your gaming laptop

Yeah. You can avoid buying gaming laptops. They are almost all burning up prematurely. I'm a victim myself. Only lasted 2 years. All my prior TOWER builds NERVER failed. Learned a valuable lesson. 2700$ down the drain

if you want the laptop just for playing, maybe a normal laptop + egpu could be an option, avoid gaming laptops if you are gonna play a lot, better a desktop pc

@@lPlanetarizado I play with my legion 5 pro for 5 hour sometime less with cooling pad and I limit the temps to 86c for cpu And gpu most of the time is 76c in heavy games

A cpu is not made for a 20v pressure..

If you look at the schematic of the buck circuit that powers IC, it becomes obvious what happens when the high side MOSFET shorts. Full PSU voltage straight to a line made for 0.8v. Current is the result of voltage and resistance.

@@OnStageLighting Is the MOSFET part of a Voltage regulation? I didn't think there was so much reglation in a MOSFET. Not like a transistor.

@@Drottninggatan2017 the high frequency switching of MOSFETs is the basis of all modern buck or boost voltage regulation circuit designs.

@@OnStageLighting Okey, tanks. But then, why can't there be a current limiter or a fuse after the MOSFET? That should be a inexpensive protection against overcurrent.

Partly because gaming laptops are always pushing the basic laws of physics.

i guess you are kind of right saying that gaming laptops are expensive and buying another one is too expensive, but if you look the adapter of gaming and no-gaming laptops you will see quite the amps difference, from like 2,5 (normal) to 10 (gaming), even 15 amps

Is it not the case of just replacing the cpu then?

@@tirinsreplacing the cpu, correct! 👍 🎉 but it has to be the same exact cpu or you’ll most likely run into bios troubles or temp problems

You must be joking, right? :D

@@electronicsrepairschool of course :D

Thank you!

Replace motherboard

Thats an acer nitro my man 😅

They are dual mosfet. With only one you control high and low side. I have same laptop for repair and the mosfet is shorted in high, low side, even the gate is shorted. Mine does show screen also, after short is gone without faulty mosfet, but i can see that mosfet controller measure the sum of the mosfet output rail, and is probably that no screen image by this, another bad possibility is dead cpu, the worst thing