Asus F554L shuts off immediately after turning on

Motherboard Asus X555L rev 3.3

[@no2thenwo737]

The last Asus Zenbook I repaired had the shutting off problem while in Windows. Re-balling the onboard DDR3 memory fixed this rare issue. It pays to have a thermal camera on a fault like this. Most of the time it is faulty mosfet on the power rail.

[@seckinseckin3919]

maybe instead of replace mosfet you can use "proper calibrated fuse"

[@dobaayaz]

🧐

[@dobaayaz]

Sorin

[@rafarafa3094]

Sorin is master of all masters.

[@kostasvarsamis4155]

bad idea. first of all, the manufactor could do it first to reduce the components expense.means that the company could drive the main 19v from the power supply connector,directly to the current sensor resistor.... even not using a current sensor at all. avoiding that way the 2x mosfets and the IC that drives those two mosfets. so,the existance of those two mosfets, its simple.... protecting your home from getting fire!! if you see 19v in drain and same 19v goes to gate throught a resistor, then it means u can use a "calibrated fuse"

[@triph7]

Εισαι τεραστιος

[@PCEYTube]

Didn't you mean you can bypassing the mosfet by bridging source and drain? not source and gate

[@darattaqwa]

Liked and subbed, was the mosfet you replaced the same or different? And could the small capacitor connecting 19v to gate of faulty mosfet be at fault? I’ve been learning laptop repairs for few months, love the videos

[@iSetUPComputerRepair]

ofc they are different the first mosfet is just a switch..

[@pc-mastor]

Hi, thanks for the comment and the subscription! The replacement mosfet was a different model but same specs with the original one replaced.

[@dimitrismaster]

As long as it's a p chanel MOSFET with the same power characteristics,it's ok.

[@oefzdegoeggl]

mmh. not sure. i hope that fixed the problem, but let's assume you actually had a problem with the driver: you previously charged the battery for a short time, enough to keep it on for 20 secs or what. so your conclusion "it stays on" came way too quickly, it could very well run off the (now a tiny bit charged) battery. at least check the voltage after the first mosfet and/or try without the battery.

[@pc-mastor]

Hi! Thanks for the comment. You're partially right. I didn't check the voltage at the source of the mosfet after replacement but i think you saw that the laptop stayed on and it was not from a charged battery. (Of course after assembly i put the disk back and the O/S loaded and i checked the battery charge and everything was ok). Actually what i skipped mentioning is that the charging IC (BQxxxx driver) is actually getting power directly from the DC Input (before the first mosfet) so that tricked me and i thought the battery was charging but it was not. If the first mosfet is broken you have a charging light but no current to the battery.

[@jozsiolah1435]

Asus has some pressure sensors on the motherboard. If the plastic cover is deformed, the pressure sensor shuts down the laptop, also it permanently locks down the battery. To start it again, you have to buy a new battery.

[@ognjenjakovljevic494]

Acer does the same

[@bitrehab]

Can you link the exact model or it's schematics or any proof?

[@ognjenjakovljevic494]

@@bitrehab Acer Aspire E 15 E5-575-33BM

[@bitrehab]

@@ognjenjakovljevic494 Thank you!

[@bitrehab]

@@ognjenjakovljevic494 Maybe I'am blind but I can't see a sensor like that only a G-sensor and a battery detect switch (probably because there's no CMOS battery inbuilt). Maybe that matters if I found the SM not for the exact model but for the Acer Aspire E5-575 735T DAZAAMB16E0.

[@theriven822]

pls do faster videos theres no point for it to be lasting that mch time

[@Userofindian]

Exactly....

[@mrzabounis]

Yes, you're probably right but the thing is that someone who wants to learn from the procedure will be driven directly to the solution without knowing how .. let me know about this

[@forsakensavior7316]

great job!