The importance of the first Mosfet - Acer Aspire 5 - power on only on battery

[@PerrynBecky]

Some have called you a hack in the past because you've bypassed mosfets before and got laptops working, but when you double checked your voltage readings and discovered the cause for the initial discovery and went further; that proves you're not a hack because a hack would have just bypassed the mosfet and not checked to see if the circuit was working properly. Excellent troubleshooting.

[@kpjVideo]

I've worked on this laptop before, there's a Adapter Sense to check if the charger is fully seated into the charging jack. Both pins on the side of the center pin on jack have to be shorted to ground.

[@electronicsrepairschool]

Thank you!

[@queenvixensthekenyanasmr4298]

@@electronicsrepairschool This guy is a hero

[@gile849]

Bravo :)

[@babyrelaxinglullabies9671]

@kpjVideo, Thank you so much for your comment! This fixes my acer nitro 5. One of the negative sense is not touching the negative side of the power jack. I had to pull it out a little bit and it worked!

[@kpjVideo]

@@babyrelaxinglullabies9671 that’s great! Nice work!

[@eg8343]

You are such an underrated technician vlogger. You are much better with anyone i've seen on youtube.

[@ohmware2020]

advance merry christmas sorin... thank you for the knowledge... more years to celebrate

[@petersmith5199]

I love your videos Sorin, but as I've said before, I'm green with envy that I will never be as clever as you!! Keep up the good work.

[@blackmanexploretv9405]

sorin i learnt alot from you i do get all laptops right after your classes kudos sorin from michigan

[@chilli-badger]

Thanks for the video Sorin...look forward to part 2 good detective work

[@georgeabaji638]

welcome back sir, we mis you Bos.

[@MrRvdbeek]

This is a different way to get to the right place on the board. You put the power supply on and I think you have a short 2,45 A but you did get it to it’s not the way it supposed to be. Thanks for the update

[@norvinsakiral4450]

I love the way you fixed things.

[@daz41262010]

great video Sorin :) looking forward to the follow on and fitting the new mosfet :) and hopefully getting it working :)

[@knightwar3]

Amazing diagnostic as always and there's a weather forecast also :) i like cold weather i hope you'll relocate to a better place, by the way i already subscribed to your helium channel

[@saltcityrepairs5121]

Sorin, dont forget my Christmas gift 🎁 : )

[@electronic7979]

Nice repair video. I liked it

[@DadofScience]

This is great, thank you, Sorin. I think I've an almost identical fault on an ASUS board. I'll report back if it proves to be a similar case.

[@novaanimereview2838]

nice explanation Sorin :D

[@ShR33k]

Sorin - I think I have this exact issue on my daughter's Asus ROG gaming laptop! I've partly fixed it - with watching you videos over the past couple of years, using voltage injection - I found the first mosfet having 19v at the drain, and nothing on the source or gate. Not knowing too much, I then used voltage injection on the source and the laptop sprung alive! The battery was flat and the laptop charging light was constantly flashing. I put a jumper wire over the first mosfet as I've seen you do in many videos and works perfectly on adapter only. Due to battery taking all night to only charge at 60%, and battery light still flashing - I did put it down to a charging circuit issue, but my "skills" was exhausted by then! I think I'll leave it for now since it now works (adapter only) and daughter only ever uses the laptop plugged in. But it does give me some insight should I ever look at the laptop again! For safety, I did disconnect the battery. Brilliant stuff. Excellent video and diagnostics!

[@zakaderechte]

Had the same issue, my Asus laptop isn't charging because the laptop needs the first mosfet for safely charging the battery.

[@coyotex850]

most likely its a power managment chip issue, the chip you saw him remove in this video

[@xlwirelesselectronicrepair]

Lots of info. Thanks for the video.

[@jozsiolah1435]

My Acer laptop reached its peak performance by draining it in Bios, record time drained my perfectly good battery in 18 minutes, in Windows regular use lasts for 1 h 9 minutes, or longer. My fan speed ran at max speed in bios the first time, and the draining didn’t generate additional heat. Typically mosfets turn on in Bios, the trick needs 10 discharges in Windows, one in Bios. I am through 5 cycles, that is 55 discharges now. Each time one extra secret ability or function turns on. My battery is 12.74 V fully charged, default 10.8v battery. The min shutdown is at 9.8v about. The battery calibration and refreshing happens in Balanced mode. That can enable 1% hibernation.

[@ultra2extreme]

Sorin - A Good British saying for someone being surprisingly early for something - "Wow, what did you piss the bed or something?" Classic

[@2vagner]

You are the Best

[@safn1949]

30C here most of the time, summer starts in March.

[@nexpro6985]

I have an Acer Aspire 5 that does have a faulty charging port. It is really fussy about the angle that the charge cable is at. ( I have three chargers and an Acer Aspire 3 that has no problems with the same chargers ). I might replace it at some point in the future.

[@ODRACLIVE]

Thank you, master!!!

[@rfr653]

good job mate.

[@marcusz.8620]

Hello Sorin, what would happen to the Laptop when you leave it like that with the wire on the first Mosfet? Will the circuit inside the battery protect the battery from overcharge?

[@johncuamag3307]

up

[@theEskalaator]

This has nothing to do with a battery charging circuit. This mosfet is used to protect from opposite voltage in charging connector. So if you have right charger - nothing bad would happen

[@Martin-ot7xj]

May i know which pin did you shorted to which pin ???please in your next videos explain more when you want to short the pins . thankyou

[@knightwar3]

Short goes between drain pins and source pins of the mosfet

[@Martin-ot7xj]

@@knightwar3 thankyou

[@verdunelectronics9985]

Sorin, -1 Degree is not that cold :)

[@MrtechFIX254]

best teacher

[@bobhrtmn]

It is funny at 12:36 the probe is accidentally touching the ground at the capacitor and melts the solder leaving a burn mark)))

[@patriciaoudart1508]

Thanks for your teaching🙏🤗. I have my laptop Doing the inverted thing. Working fine without battery, rarely shutting down suddenly without any reason. But when I insert the battery wich is a new or a old, and power on, the computer shut down, and a light blink. Return to normal if I unplug the charging port, but also removing the battery. I have not opened it for now, because I use this ACER, without the battery, but this is boring not to be able to move without a cable. So, perhaps, as this is not regular, I was thinking that could be a bad sold issue? I take a lot of care to my laptops, this one was a older one from my daughter with Win7 native, A4 inside, as new, sometime as I see the dirty ones you have to repair, I'm laughing... How people can give to repair a computer without any care! With the dust and digit prints everywhere, this is amazing. I have for music lot of computers because every one drive a virtual instrument, and also very old ones, with win 95, electronics and technical aspect of things are not my speciality, but when you have old keyboards from the eighties and old material, but no money, you must be able to do the things by yourself, so.🤯🙀🤗😾😉💫

[@moritzhackenberg9192]

The cpu van on my unit a517 51G is constantly starting and stopping. The led at the bulb sign is blinking. I have done the battery reset, and disconnected the battery. (the laptop shut down spontaneously doing some windows repair stuff) any ideas? The screen stays black

[@danielsaturnino5715]

Are you going soft Sorin? Are helium radio waves making you order parts? :)

[@xpanza]

What is the diametar of the "fuse" please.

[@acalat]

First go check the Caps near the Io chip in resistance mode then re program the bios chip even it gives 1.8

[@moritzhackenberg9192]

My a517 51G turned off spontaneously doing some windows repair stuff. When I turn it on now, the blue led above tue light bulb sign blinks and the cpu van starts and stops constantly, the screen stays black. Any idea what this could be? I have done the battery reset, and also tried with the battery disconnected.

[@viatoris2000]

the exact same symptom! Acer A515-54 8th gen i5, changed the BQ24780 didn't fix the problem.

[@caldari5146]

How much do you charge fixing the laptops? I have a acer predator helios 300 that doesn't hold a charge even though its connected to the adapter.

[@pirelli77]

9:33 brilliant, the manufacturer has now saved 50 dollars. 💪😂😊

[@juansuarez4655]

I have a problem with one similar to this one, that while it was on it stopped charging the battery, then I turned it off and I realized that voltage is returning to the charger since, when I disconnect the charger from the current, it keeps telling me that it is on charging, but obviously it discharges me, that's why I wanted to know more or less what the problem could be, the battery is not charging and it doesn't turn on without the battery either

[@makrisg21]

tanks

[@theoriginalrecycler]

If you scanned the spare boards into acrobat, you could search part numbers

[@s.d.l.lochanabandara5261]

I have same problem how to fix this... what is solution

[@c13rooks99]

For anyone who is confused about what a MOSFET is that's regularly mentioned, here's so information. The metal-oxide-semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET), also known as the metal-oxide-silicon transistor (MOS transistor, or MOS), is a type of insulated-gate field-effect transistor that is fabricated by the controlled oxidation of a semiconductor, typically silicon.

[@junaidaslam2170]

Hi model Aspir E1-571 Sir I have the issue with my laptop the issue is when I just put charger in laptop and press power button there no display just blue light on and nothing less I need your guide lines can you please help me Thanks

[@flavius33y]

if i want to send a product to your shop ... where I can find the address ? or how can I get in touch with you for a quote ? can someone help me with some details ? many thanks

[@lordred7462]

he dosn't want to repair stuff for viewers.

[@flavius33y]

he`s based somewhere in Grays (essex) ... and I live around.. closer to London... and i have a device i couldn`t fix around me... because this pro repair people here... they fix only easy stuffs for a lot of money if it`s possible.. if i chat with them about my problem they pretend to be busy and ask me to leave the device and ofc they can`t fix it... it about a mother board issue ...

[@seckinseckin3919]

@@flavius33y what you mean by motherboard issue? Did you really watch this channel? Because half of his work is motherboard issues

[@dimitrismaster]

Haven't looked up the chip, but I fear it may be serialized to the motherboard, since many charging ic have some kind of firmware, impossible to obtain, unless you are the factory. If the said chip has memory inside, (look the data sheet) then its game over unless you can find a donor board.

[@OnStageLighting]

BQ chips (various numbers) are a reasonably common TI battery charge controller found in all kinds of charging applications. One of the better known ones to repair shops is in the Nintendo Switch. However, getting hold of pretty much anything from Texas Instruments is difficult at the moment. Everything is expensive and/or on back order for many months in the future.

[@thenoxy1549]

Hi , I have this laptop , Acer Aspire 5 515-44 , it will randomly shut down for no reason. Any ideas why?

[@MrBaca325]

No part 2 ?

[@Electronics_Repair_NZ]

yay , an Electronics repair video , way better than helium videos of sorin making lots of money. repair school better.

[@h2ostation598]

Hi, could i ask you a favor will you please help me to find a circuit diagram of HP Pavilion 15 sound beat. Because i want to fix my Laptop.

[@kuuchapheny]

Asus X441U series only works with the charger but when I remove the charger it goes off yet the battery shows 75% it uses inbuilt battery 3 small cells

[@MusicalRetroAdventures]

how much cash should one charge for such repair?

[@grzegorztrzebinski6661]

hmm, for me is strange. Imagine that you don't have any power in battery. In this case charging chip doesn't work and doesn't send any "message" to first mosfet. So how battery can be pick up when first mosfet block power? For me something is not clear is this situation...

[@SiiliViin]

i think it is not just to make it cheaper, but equally they try to make it lighter. Less parts means less weight and thinner machine.

[@Radek__]

2:13 Soirn but what about thunder/lightning? that antena it is now the higest point on your house/garden.

[@lucymc0191]

great video sorin .....is your wife not working with yous any longer ...she was good with putting iphone back together after your repair .. and sometimes yous joke with each other

[@BPjunk]

👍👍

[@arjaybesa3029]

💙

[@Pihmusik-PiCh-Expert]

[@AnonymousRepair]

You are going to waste money by buying the bq24780 chip which is working fine the fault is the 3rd mosfet (PQ2) from the battery to the system , You have 1st then 2nd mosfet there is a 3rd one from the battery to the system power (main voltage rail) then you have the highside and lowside to charge the battery the 3rd mosfet is shorted

[@electronicsrepairschool]

Nope, i did checked the voltage there without battery connected and i got 1volt. ..so, no, that one is not shorted

[@AnonymousRepair]

@@electronicsrepairschool there are only 2 ways the main voltage rail can reach the battery though the high side mosfet and the 3rd mosfet, maybe having the battery in opens the 3rd mosfet in some way I would plug in the ac adaptor and battery then remove the battery and see if main voltage rail is present on the battery rail

[@alexyo5402]

@@electronicsrepairschool Hi Sorin, are you from Romania? I have a problem with an Asus laptop and I would like to send it to your service shop

[@johannbiker8803]

😊😊😊👍👍👍👍

[@jackjohnson-w2s]

Funny. Sorin never ever mentions Mining Helium tokens anymore. He must have been disappointed in the results. . . .

[@onetimelifebigcamera1607]

😍😍

[@mr.k3224]

Laptops these days are getting ridiculous. With smaller boards and absence of cd-rom and hdd there is enough space for bigger battery and better cooling. But manufacturers are trying to save on one screw so how can we expect anything better. Not to mention that on my laptop from 20 yrs ago I had 2MP camera and now laptops come with VGA camera! Few years ago I bought Acer laptop that wasnt cheap (subjective) with last gen ryzen cpu. After some time i tried to game a little. At that moment something fell off. What I realized cpu intensive games wouldnt play good. Because games were much older than cpu ive startet grinding on forums and information that was there shocked me! Manufacturer ACER in the intention to save money didnt design proper cooling system so they restricted CPU to cooling wattage. Why didnt they just put less expensive, less powerful cpu instead of making shit cooling system? Not to mention that battery charge is shit also. But cherry on top is charger so weak its struggling to even charge if laptop is using full potential. If anyone red this whole text im sorry for wasting your time, but this needed to be said. Better buy expensive phone than expensive laptop (my opinion).

[@grandprime7397]

Pls zoom in while checking

[@joeh4732]

Oook

[@hichameham4124]

Dodgyy definitely

[@weerobot]

"Where are my Mosfets"..

[@boggy6060]

I just fixed mine. Replaced a MOSFET. Missed my porn.

[@saltcityrepairs5121]

I get to be the first??

[@ReballingBGA]

👍👍👍