Thanks, I found the BQ chip and replaced it, now I get the voltage on the battery connector, though it is very low, about 10V. After charging the battery manually, the laptop is turning on, and the critical low battery error is not showing up anymore. The issue that still persists is that the laptop does not work without the battery, it turns on, but shows the same critical low battery error, and shuts down. When the battery is connected and the laptop is working, the battery wont charge.
Also one thing to note is that even after changing the BQ chip, the pin #24 does not show 6V...
Integra
Member
Last Activity: 03-25-2025, 02:25 PM
Joined: 03-01-2017
Location: Sinj
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resistance to ground on pqb4 is 3.37 Kohm
on PIN 28 i have a 18.18V, but on pin 24 i dont have 6v, just 0.027v
and reason is that i have short to ground on thath pin, around 19 ohms
so again remove BQ and than measure ?...Last edited by Integra; 03-14-2025, 06:17 AM.Leave a comment:
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hi still didnt fix this laptop, cant find excat BQ chip, any idea about where to find compatible one ?Last edited by Integra; 03-14-2025, 06:07 AM.Leave a comment:
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I have a new update if this information is useful to you: I made one modification. I added 19V to the ACDRV_CHGR pin, and now the MOSFETs are enabled. I also have voltage on the drain for both MOSFETs. The laptop turns on, but it's still not charging.
I noticed with a thermal camera that the BQ chip is hot (around 47°C) even with no battery connected. After I get a picture, a message appears: "BATTERY CRITICAL LOW," and the laptop turns off, even though the battery is not connected. I get same message when laptop work on battery without charger,but battery is realy drained...Leave a comment:
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removed from board values:
PQB3
source to drain 8k ohms
source to gate 0L
[B]gate to drain 0L[/B]
PQB4
source to drain 8k ohms
[B]source to gate 8k ohms[/B]
gate to drain 0L
it is really hard to measure this small components and getting diffrent values all times.
But DCA 75pro detects on both parts n chanell mosffet if that mean someting.
i have few multimeters and every one gives diffrent values.
update: replaced both mosfets and still there is no voltage on drain for PQB3
what voltage...Last edited by Integra; 02-04-2025, 12:16 PM.Leave a comment:
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PQB3
source to drain 355k ohms
source to gate 295k ohms
gate to drain 8.66k ohms
PQB4
source to drain 8k ohms
[B]source to gate 0.10 ohms, checked again and now it is show 8k ohms[/B]
gate to drain 28k ohms
so PQB4 is defective ? but i think that i tested it off board and was fine I think.
cant remember
ps Coguar is my workmate, he starded job, and ask me to answer here and continue becouse he has to leave now.PQB3
source to drain 355k ohms
source to gate 295k ohms
gate to drain 8.66k ohms
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Weird, the ram passes in testing, and I will try to install the OS and report.
Tnx for Your explanation.Leave a comment:
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tnx for answer, still i have acpi bios error while trying to boot from windows pe usb, ubuntu from usb boots fine and works.
manufactor mode unlock still pressent, and i cant remove it if i cant boot to windows ?
can you try another file from zip ? in a meantime i run system diagnostic mem test (F2) to be a shure that another ram is fine....Leave a comment:
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Here is the original BIOS dump, and after that, a few more BIOS dumps in the same file. I used the first one, and the laptop works, but there is an issue with booting into live Windows (I get an ACPI BIOS error). So maybe another one from that RAR or ZIP file would be a better match?
I will also include two original BIOS dumps in case one is corrupted, i think third_read is fine becouse of 8mb size.
The laptop has a touchscreen, if that is important.
Thanks for any help....Leave a comment:
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ok, i find and bought bios dump online, and now i have a question.
Can i upload it here and can somebody help me combine me region from old backup dump to new working file ?
I have 2 problems now, manufacter mode and acpi bios error while booting from windows pe usb to test system.
Laptop have 2 ram modules and one goes bad, so i think that is a reason for corrupted bios.
Tnx for answer and help....Leave a comment:
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here it is
Don't post pictures unless asked....There are no bios or drivers for this model on the manufacturer's website yet....Leave a comment:
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Hi need good bios dump for this HP Envy 15t-ae000 CTO
HP Envy 15t-ae000 CTO
M/N 15t-ae000
P/N: L3T62AV
S/N: CND526570F
HP ENVY, no picture, but turns on.... -
ps, is there any info where I can learn to remove passwords from my dumps? tnx I m new here so dont be angry if I ask something that is maybe not allowed, sry in advance.Leave a comment:
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hi "we have a picture
" tnx man...
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hello dell latitude 3420, i need bios admin password unlock, cant change boot menu and reinstall laptop. tnx in advance
Also one question, from my dump You just remowe password, what about sn key and mac address
ST: FHP0NG3...Leave a comment:
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Hello, I am an owner of small computer shop / service from Croatia, Im here for bios dumps sharing, and also motherboard schematics.
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