• HP ZBook 15 G6 - Brak karty WiFi

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#1 HP ZBook 15 G6 - Brak karty WiFi


by Grzechquu 23 July 2024, 10:39
Cześć prosił bym o pomoc, podpowiedz, wskazanie miejsca lub co zrobić, co sprawdzić gdyż płyta nie widzi karty WiFi.

Historia:
ZBook trafia do mnie nie wstaje, problemem okazał się zwarty most.

Udało się dorwać inną płytę i ogarnąć BIOS numery S/N itd. przeniesione ale dopiero wtedy zorientowałem się, iż nowa płyta nie ma WiFi (wlutowany układ intel AX200D2WL ) + nie ma obsadzonych układów.
Przerzuciłem drobnicę jak i samą kartę 1 do 1 porównując z płytą z uszkodzonym mostem nie nadal nie widzi tej karty WiFi.
Dorwałem schemat i boardview do 17 i widzę, że jest rezystor PCIE/CNVi ID R18132 ale za cholerę nie mogę go znaleźć na płycie 15" przeszukałem płytę porównując obszar po obszarze i wszystko wydaje się być identycznie.

Obie płyty są identyczne, obsadzenie elementów identyczne.
Płyty mają oznaczenie DAXW2EMBAE0 REV: E

Czy walczył ktoś może z podobny tematem albo jest w stanie wskazać jakiś punkt zaczepienia?

Z góry dzięki.

Re: HP ZBook 15 G6 - Brak karty WiFi


by Google Adsense [BOT] 23 July 2024, 10:39

#2 Re: HP ZBook 15 G6 - Brak karty WiFi


by matic 24 July 2024, 09:13
Hello!

Please, post a clear pictures of the marked area from both sides of both boards - the one with a damaged bridge and the other to which you transferred the CNVi module.
Image

#3 Re: HP ZBook 15 G6 - Brak karty WiFi


by Grzechquu 24 July 2024, 11:36
Proszę obrazy
Image


Image

#4 Re: HP ZBook 15 G6 - Brak karty WiFi


by matic 26 July 2024, 11:47
The pictures you posted are not very clear. Instead of one picture, you can take two - one of CNVi module area and another of PCH chip area.
In addition I asked for pictures of the same area from both sides of the board.

If you have a picture of CNVi module area of the board with a damaged bridge in their original state (before removing the CNVi module and other small components) post it as well.

#5 Re: HP ZBook 15 G6 - Brak karty WiFi


by Grzechquu 29 July 2024, 06:32
Unfortunately, I don't have a photo of what it looked like before removing the chips.

However, I am 100% sure that I put everything in the right places.

Damaged PCH:
Image
Image
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Working board:
Image
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#6 Re: HP ZBook 15 G6 - Brak karty WiFi


by matic 16 August 2024, 12:03
Measure the voltages to ground on listed points:
- On pin 2 of resistor R4122.
- On pin 2 of capacitor C4108.
- On pin 3 of transistor Q4104.
- On pads 2, 3 on the place of coil L4100.

All components according to the BoardView for Quanta XW2A, Rev: G.

#7 Re: HP ZBook 15 G6 - Brak karty WiFi


by Grzechquu 20 August 2024, 11:19
Hey, sorry for the delay, I was on vacation.

I don't know which elements these are. I don't have BoardView and the disc has no markings.


Thanks for verifying.

#8 Re: HP ZBook 15 G6 - Brak karty WiFi


by Vogelek23 20 August 2024, 12:21
Grzechquu wrote:I don't have BoardView and the disc has no markings.
Dokumentacja jest dostępna na forum: schemat-hp-zbook-15-g5-quanta-xw2-da0xw2mbab0-da0xw2mbag0-xw2a-t73141.html

Grzechquu wrote:I don't know which elements these are.
Punkty pomiarowe i lokalizację elementów zaznaczyłem na poniższym obrazku.
Image

#9 Re: HP ZBook 15 G6 - Brak karty WiFi


by Grzechquu 21 August 2024, 09:34
- On pin 2 of resistor R4122. - 3,38V
- On pin 2 of capacitor C4108. - 3,38V
- On pin 3 of transistor Q4104. - 3.08V
- On pads 2, 3 on the place of coil L4100. - nieobsadzony, sprawdziłem jeszcze na innej płycie bo akurat mam innego laptopa jeszcze i też nie ma tej cewki a WiFi jest wiec to nie to - 0V

#10 Re: HP ZBook 15 G6 - Brak karty WiFi


by matic 21 August 2024, 09:42
Grzechquu wrote:- On pads 2, 3 on the place of coil L4100. - nieobsadzony, sprawdziłem jeszcze na innej płycie bo akurat mam innego laptopa jeszcze i też nie ma tej cewki a WiFi jest wiec to nie to - 0V
I know this coil is not fitted and that's why I wrote "on the place of coil".

Set your multimeter to the diode test mode and measure the voltage drops to ground on pads 2, 3 on the place of coil L4100 with both polarities of test leads.

#11 Re: HP ZBook 15 G6 - Brak karty WiFi


by Grzechquu 27 August 2024, 10:04
pad 2 - 1,15V / 0,44V
pad 3 - 1,29V / 0,44V

#12 Re: HP ZBook 15 G6 - Brak karty WiFi


by matic 27 August 2024, 14:42
Are your solder joints on all pins of CNVi module fine?
It's usually hard to apply an equal amount of solder to all the pads with a soldering iron. So it may happen that some pads do not have contact with the motherboard due to too small amount of solder on them.
Instead of using a soldering iron, I attach BGA solder balls to the pads of CNVi module to avoid this problem.

Re: HP ZBook 15 G6 - Brak karty WiFi


by Google Adsense [BOT] 27 August 2024, 14:42
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