Testing The Charging Circuit On A Laptop Motherboard Part 1




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jazzman427: This is great, very nice of you to share. Where is the best site to get schematics at minimal cost?

Dario Mendoza: pretty cool !!!

Karen O: Well Done! missing the brain part that tells me 5V. How do you know? it wasn't marked. Could it be on the Board?

nikpacara: Darren, can you explain me this part of mosfet Q22:

https://youtu.be/qcWowCgOFOw?t=769

Why it should have 19v out from the Drain pins as well...?
I have a problem at my laptop and exactly at this point doesn't give me 19v out?! My laptop is HP Compaq 6830s and the Mosfet number is Q1031

Can you explain me if you were right because this might be my motherboard's problem! Thanks

Alan Whitaker: Great video extremely informative

Attila Szabo: wish i had fata sheet

Attila Szabo: Hello
I measured mosfet transistor and there is 19v on one side 0 on the other during charge... faulty? I chacked online there is no part like this: 4856A mosfet go T76B

Francisco Junior: oNE OF THE BEST TUTORIAL I`VE SEEN SO FAR...TKS....

Chic01taliano: Where to find laptop schematics ?

ali behrouz: nice job

Anjeep Verma: hi.. i hve a ASUS laptop motherboard. on powering it doeant gets on. on pressing d south bridge ic. it starts.

i thought it must b some loose connection somewhere. so i cleaned total mbd wid ip solution and heated my motherboard. but still no success. pls help me.

The Yorkshire Carper: Hi daz great video i have a laptop that will turn on sometimes and then other times it wont i have to constantly plug it in and out then i can finally get it to turn on and it will run fine any ideas as its warranty has ran out TIA for any info

Shashank Singh: There is issue of reverse current in my laptop how to repair it.plz help

Leo Gurdian: a challenge in itself IS getting a hold of the schematics; it's nightmare lol

Edy Turnas: Hello I have an acer aspire one 725 0412, when I plug the adaptor the laptop work normally, but the battery doesn't recharge, a message "battery 0%available, plugged in but not charging" appear. I went to Device manager, battery , uninstalled drivers and reinstall but was the same. I bought a genuine brand new battery and nothing change. I measured the adapter and was fine, and the laptop work normal with it.
Can you tell me if I measure the battery connector on my laptop, which ammount of volts is the normal number to read?, because I measured and the maximun was 3.36 per each contact. Do you know what can I check ?Appreciate your help.
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Hack sci 4 Fun: Plz help me ! My Sony VAIO E 1513 laptop stop working just after when I plugged in its charging pin, and that time VAIO charger power indicator light blinking always when plug with laptop . to find what's prob ! Temporary i maked short circuit of 19 v its DC adapter when I did it's indicator also Blinked. I got that there is short circuit inside laptop component !! After when i removed its cover and plugged charger I find ---- while I connect charger plug MOSFET - ' 4439GH ' of its DC2DC convertor circuit being Heated !! ?? I think MOSFET burned and make showcircuit in circuit and prohibited current flow to motherboard ?? That's why my laptop not turn on ???? Nd m Unavailable to remove Smd MOSFET by soldering iron ! It's not provide enough Heat to malt it's Tin :-( :-( plz help me ?

attack125: how did you find an electrical diagram of the motherboard.  been trying to find one for mine. but i cannot find one anywhere. probook 5330m i3

Al Daniel: Where is the best place to go for free Laptop Motherboards Schematics.

Turd Neck: at 6:54 Ive heard enough drawring, its DRAWING dumb twat , learn to talk retard

ANDREA MODIANO: Thank you for this wonderful tutorial.
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Testing the charging circuit on a laptop motherboard Part 1