• HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

It is currently 14 December 2024, 04:51

HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

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#1 HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by inventco • 23 February 2024, 08:03
Witam.
laptop Jak w temacie

PCB: LA-H323 REV 1.0
CPU: SRGL0
NO GPU
KBC: KB9022Q
BIOS OH128AHIG

Laptop po podłączeniu pobiera przez chwilę jakiś prąd rzędu 30mA po kilku sekundach spada do 0.
Płyta lezy na stole.
Bios wgrywałem inny
Wstawiłem KBC z drugiej płyty wyczyszczone SVODEM zaprogramowane. bez zmian
reaguje na PWR ON ale tylko 20mA i po chwili off.

Napięcia +5VALW/+3VALW/+3VALW_DSW obecne.
Ale nie pojawia mi się napięcie na cewce PL1001 (1.05V prim)
Na PU1801 nie mam 1,8VSP za czym idzie brak 1.05V
Ale nie mam na tej przetwornicy sygnału enable który idzie z kbc o nazwie PCH_PWR_EN
I teraz pytanie dlaczego :D kbc nie wystawia enable.
Bios zmieniony.
KBC przeprogramowany drugi wsstawiony przeprogramowany
Help :D

Re: HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by Google Adsense [BOT] • 23 February 2024, 08:03

#2 Re: HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by matic • 23 February 2024, 10:58
Hello!

- Measure the voltage directly on jumpers CLRP1, CLRP2.
- Measure the voltages to ground on pins 37, 67, 75, 110, 111, 115, 124, 125 of KBC chip.

- Measure the voltages to ground on pins 114, 122 of KBC chip in the following cases:
a) Power button released.
b) Power button pressed

Now disconnect the power supply, wait a few seconds, reconnect it and perform the following measurements.

- Measure the voltages to ground on pins 6, 13, 14, 16, 17, 93, 95, 100, 104, 107, 116, 123, 127 of KBC chip in the following cases:
c) Before pressing to the power button (machine turned off).
d) After pressing to the power button (for a short time, when the power consumption is 20mA).

- Measure the voltage to ground on pin 2 of resistor RC103 in cases "c", "d"

#3 Re: HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by inventco • 29 February 2024, 21:06
helloo

measurements:
on CLRP1 and CLRP2 0V
37 3,3V
67 3,3V
75 0,6V
110 3,3
111 3,3
115 3,3
124 3,3
125 3,3

114 3V pwb pressed 0V
122 0V pwb pressed 3,3V
pin c ; d;
6 0 ; 0
13 0; 0
14 0; 0
16 0; 0
17 0; 0
93 0; 0
95 0; 0
100 0; 0
104 0; 3,3
107 0; 0
116 0; 0
123 0; 0
127 0l 3,3

RC103 0; 3,3

#4 Re: HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by matic • 1 March 2024, 07:49
Measure the voltage and resistance to ground on pin 1 of diode DC1.
Diode DC1 pinout:
Image

#5 Re: HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by inventco • 1 March 2024, 08:53
over 20k to ground
3,2V ...

but i dont understand what happened....
laptop just start now normally
i do not do anything since yesterday today i removed metal plate i was preparing to reflow this motherboard....
now i saw Your post measure this point have voltage put power on and laptop boots normally

Re: HP 15-DW płyta LA-H323P 20mA po naciśnięciu pwr on

by Google Adsense [BOT] • 1 March 2024, 08:53
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).
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