• HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Danes je 3 Februar 2026, 22:48

HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

 Pravila foruma: Klikni tukaj za prikaz pravil na forumu

  1. Naslov teme mora vsebovati: proizvajalca naprave, poln model in kratek opis okvare.
  2. Sporočilo teme mora vsebovati: oznako tiskanega vezja (v primeru popravil strojne opreme), razširjen opis okvare, kaj je bilo preverjeno, zamenjano in/ali izmerjeno, sklep in vprašanje. Če ne morete najti oznake tiskanega vezja, morate prebrati TO TEMO. Če še vedno ne najdete oznake, prosim objavite kakovostne fotografije obeh strani matične plošče - potrebno je odstraniti vse folije in module, ki bi lahko zakrivali te oznake.
  3. Pred objavo nove teme, preberite vse teme v podforumu USPOSABLJANJA, in naredite predhodno diagnostiko na podlagi vsebine teh usposabljanj.
  4. Nalaganje celotnih navodil/shem, BIOS / firmware datotek, ali objavljanje povezav, ki vodijo do drugih spletnih strani s takšnimi datotekami, je SROGO PREPOVEDANO. Lahko objavite le majhen del navodil/shem, ali povezavo na BIOS datoteko v podforumu NEVERIFICIRANE DATOTEKE BIOS/EFI. V eni temi ne smete objaviti več kot eno stran navodil/shem. Datoteka ne sme vsebovati vidnih žigov "zaupno",, e-poštnih naslovov ipd.
  5. V eni temi lahko opišete SAMO eno napravo. Za vsako drugo okvarjeno napravo morate odpreti novo temo.
  6. Zahteve za sheme, boardview, fotografije matičnih plošč, datoteke BIOS-a ali servisne priročnike za storitve NISO DOVOLJENE. Če želite vprašati za katero koli od teh, odprite novo temo v podforumu ZAHTEVA ZA DOKUMENTACIJO & DATOTEKO BIOS/EFI.
 Ta tema je označena kot ARHIVSKA. Odgovorite samo, če vaše sporočilo vsebuje rešitev (Pravila in Pogoji, 12.1).

#1 HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 4 Januar 2023, 15:20
Po podłączeniu zasilacza labolatoryjnego pobór skaczę z 0,008A do 0,012A. Dioda power mignie i tak w kółko. Napięcie na cewce L6000 "skacze" od 1,6V - 2,3V.

Oporności na cewkach:
L6000 - 58 kΩ / 1,6V - 2,3V
L6200 - 327Ω / 0V
L6100 - 5,4kΩ / 3,3V
L6610 - 54Ω / 0V
L6300 - 42kΩ / 1,074V
L6350 - 4,5kΩ / 0V

Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a Google Adsense [BOT] • 4 Januar 2023, 15:20

#2 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 4 Januar 2023, 22:30
Hello!

How about the coil L6150?

#3 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 5 Januar 2023, 13:45
matic napisal/-a:Hello!

How about the coil L6150?


L6150 80.6 kΩ / 5,123V

#4 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 5 Januar 2023, 19:26
bar007 napisal/-a:Dioda power mignie i tak w kółko.
Which LED exactly? Do you mean the LED near the DC socket?

#5 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 7 Januar 2023, 09:18
matic napisal/-a:
bar007 napisal/-a:Dioda power mignie i tak w kółko.
Which LED exactly? Do you mean the LED near the DC socket?

D9100 LED near the power button. It looks like the motherboard is trying to boot up

#6 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 7 Januar 2023, 12:08
How about the LED near the DC socket? Does it lit or not?
Does the battery charges?

#7 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 7 Januar 2023, 13:01
matic napisal/-a:How about the LED near the DC socket? Does it lit or not?
Does the battery charges?


The LEDs near the power socket do not light up. I think the problem is with the power supply because when I measure the voltage on Q110, the voltage jumps between 19.5V to 17V, and it should be constant.

#8 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 7 Januar 2023, 13:15
bar007 napisal/-a:when I measure the voltage on Q110, the voltage jumps between 19.5V to 17V, and it should be constant.
You should missed something. Transistor Q110 has nothing to do with the power supply on this board.

Measure the voltages to ground on pins 1, 4, 8 of transistors Q6010, Q6011 with the power supply connected only (without battery). Check, if the voltages are constant.
Slika

#9 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 10 Januar 2023, 10:00
matic napisal/-a:You should missed something. Transistor Q110 has nothing to do with the power supply on this board.

Measure the voltages to ground on pins 1, 4, 8 of transistors Q6010, Q6011 with the power supply connected only (without battery). Check, if the voltages are constant.


Q6010 pin 1 = 19,5V
Q6010 pin 4 = 6.05 V ~ 10V when the D9100 LED lights up, the voltage jumps to about 10V
Q6010 pin 8 = 19,5V ~ 17,3V when the D9100 diode lights up the voltage drops to about 17.3V

Q6011 pin1 = 19,5V ~ 17,3V when the D9100 diode lights up the voltage drops to about 17.3V
Q6011 pin4 = 25V ~ 23V when the D9100 diode lights up the voltage drops to about 23V
Q6011 pin8 = 19,5V ~ 17,3V when the D9100 diode lights up the voltage drops to about 17.3V

#10 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 10 Januar 2023, 11:13
bar007 napisal/-a:Q6010 pin 1 = 6.05 V ~ 10V when the D9100 LED lights up, the voltage jumps to about 10V
Q6010 pin 4 = 19,5V
Q6010 pin 8 = 19,5V ~ 17,3V when the D9100 diode lights up the voltage drops to about 17.3V

Q6011 pin1 = 25V ~ 23V when the D9100 diode lights up the voltage drops to about 23V
Q6011 pin4 = 19,5V ~ 17,3V when the D9100 diode lights up the voltage drops to about 17.3V
Q6011 pin8 = 19,5V ~ 17,3V when the D9100 diode lights up the voltage drops to about 17.3V
These measurements are strange. You most likely counted the pins of transistors wrongly.
Transistors pin count:
Slika

#11 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 12 Januar 2023, 09:33
matic napisal/-a:These measurements are strange. You most likely counted the pins of transistors wrongly.
Transistors pin count:


I'm sorry, I corrected my previous post

below Q6010 PIN8 when LED D9100 is on

Slika

#12 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 12 Januar 2023, 12:19
Measure the voltages to ground on all pins of transistor Q6013 with the power supply connected only. Check, if the voltages are stable.
Transistor Q6013 pin count:
Slika

#13 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 13 Januar 2023, 15:15
I don't see the Q6013 transistor. Connection from the resistor R6016 and the Q6009 chip is marked in yellow. I marked the voltages in red.
Slika
Sorry for the quality of the photo but we don't have a microscope attachment and I did it with a smartphone

#14 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a matic • 14 Januar 2023, 14:26
Measure the voltages to ground on pin 15, 42 of KBC chip. Check, if the voltages are stable.

#15 Re: HP 840 G2 6050A2637901-MB-A02 - Jedno mrugnięcie diody power

Napisal/-a bar007 • 18 Januar 2023, 12:58
matic napisal/-a:Measure the voltages to ground on pin 15, 42 of KBC chip. Check, if the voltages are stable.


PIN 15 = 1,180V
PIN 42 = 0 ~ 0,689V when the D9100 LED lights up, the voltage jumps to about 0,689V

 Ta tema je označena kot ARHIVSKA. Odgovorite samo, če vaše sporočilo vsebuje rešitev (Pravila in Pogoji, 12.1).
Podobne Teme
  Lenovo Legion Y540-15IRH płyta NM-C221 rev: 2.0 migają tylko diody power.  [REŠENO]
HP ENVY 17-CR [LA-M058P Rev:1A] - No power no response to power button
  Laptop HP 840 g5 prośba o identyfikację elementu.  [REŠENO]
HP EliteBook 840 G5 COMPUTRO-6050A2945601-MB-A01(A1) Nie uruchamia się.
  Żelazko Bosch Sensixx'x DI90 - uszkodzone diody Zenera SMD - jakie?  [REŠENO]
Acer Aspire LA-7912P Rev.1.0 - brak zasilania SPI, diody LED włączają się na ok 3s

Kdo je na strani

Po forumu brska: 0 registriranih uporabnikov in 0 gostov

_______________________________
Vse pravice pridržane. Nepooblaščeno kopiranje vsebine te spletne strani ali njenega dela je strogo prepovedano.
Vse blagovne znamke, izdelki ali storitve, objavljene na tej spletni strani, pripadajo njihovim zakonitim lastnikom, so avtorsko zaščitene in se uporabljajo samo v informativne namene.