• 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
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#1 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 31 January 2024, 21:16
Dzień Dobry

Pacjent to HP EB 840 G2.
Początkowo dostałem go po próbie "naprawy" BIOS.
5 pad od BIOS był zerwany. Laptop nie pobierał prądu, nie uruchamiał się, trup.
Zregenerowałem ścieżkę, wlutowałem BIOS, laptop się uruchomił, ale wentylator kręci na FULL.
CAPS LOCK mrugnie 5x. Chciałem naprawić BIOS programem Pana Andrzeja, ale BIOS, który "oryginalnie" wydawał się już grzebany, nieoryginalny.
Wgrałem BIOS z innej strony wraz z EC, bez zmian.

Wstępne pomiary:

L6100 - 5K ohm - 3.3V
L6200 - 150 ohm - 1.35V
L6000 - M ohm -1.13V
L6150 - M ohm -5V
L6610 - 25 ohm - 1.8V
L6300 - 4K ohm - 1V

Pobór jest stały na poziomie 0,380V.
Myślę, jeszcze nad wgraniem wsadu dostępnego tutaj na forum, ale czekam jeszcze na Wasze opinie.

Pozdrawiam

Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Google Adsense [BOT] 31 January 2024, 21:16

#2 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Vogelek23 1 February 2024, 00:26
Golima wrote:Wgrałem BIOS z innej strony wraz z EC, bez zmian.
Region ME wyczyściłeś? Jeśli nie, to od tego należy zacząć.

#3 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 1 February 2024, 18:24
Pobrałem wsad bios i ec z forum. Wyczyściłem ME region.
Dalej bez zmian. 5x CAPS LOCK z NUM LOCK i wentylator kręci na MAX.
Pobór 0,390V

#4 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 3 February 2024, 00:32
UP

#5 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by matic 3 February 2024, 12:26
You may cleaned the ME-region unsuccessfully. Open a new topic in "ZAPYTANIA O DOKUMENTACJE/BIOS" department, upload the dumps of both your old (original) BIOS chips there and ask for cleaning the ME-region. Don't forget to specify the major ICs markings according to the rules.

#7 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 5 February 2024, 12:24
Hej

Wgrałem wsad zgodnie z tym co podesłał Vogelek23 i niestety dalej jest to samo.

#8 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Vogelek23 5 February 2024, 23:28
Zamieść wyraźne zdjęcie naprawionego obszaru z układem BIOS - być może brakuje jakiegoś elementu.

#9 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 6 February 2024, 10:35
Proszę:

Image

#10 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by matic 6 February 2024, 17:07
Do you have an oscilloscope?

Measure the voltages to ground on all pins of fan connector CN4300, when the machine is turned on with the fan connected and disconnected from the board.

#11 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 6 February 2024, 18:04
podłączony
1- 5V
2- 0V
3- 1,69V
4- 3,3V

odłączony
1- 5V
2- 0V
3- 3,3V
4- 0,9V

Pobór 0,280A

Niestety nie ma oscyloskopu.

#12 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by matic 6 February 2024, 20:27
Install the CPUID HWMonitor.
Run the installed software and post the screen here.

#13 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 6 February 2024, 20:59
Ale ten komputer się nie uruchamia, nie mam jak zainstalować oprogramowania.
Po wgraniu wsadu BIOS z czystym ME laptop elektrycznie uruchamia się, ale jest czarny ekran i po kilku sekundach wentylator zaczyna kręcić na full.
Pobór jest stały, bez wentylatora to 0,280A, z wentylatorem 0,390V.

#14 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by matic 7 February 2024, 21:48
Golima wrote:Ale ten komputer się nie uruchamia
You should mention that in your firs post.

However, measure the power consumption (in mA) of the board, when the machine is turned on with and without RAM memory connected.
Are there any changes in operation of the board, if you run the machine without RAM memory?

#15 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 10 February 2024, 13:43
OK.

Bez RAM - Stały pobór 390mA
Z RAM - Stały pobór 394mA

Czyli bez różnicy. Wentylator kręci na pełną moc.

#16 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by matic 11 February 2024, 19:09
Does the machine responds to pressing the power button?

#17 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 12 February 2024, 13:05
Po podłączenie zasilania, laptop dokonuje autostartu, jest czarny ekran.
Po około 10 sekundach, wentylator kręci na pełne obroty.
Jeżeli dłużej przytrzymam guzik to laptop się wyłączy.

#18 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by matic 12 February 2024, 17:14
- Is the RTC battery fine (the voltage on it should be 2.8V at least, when it's connected to the board)?
- Measure the voltages to ground on pins 1, 4 of quartz X4750 with the RTC battery connected only (without power supply and main battery). It's best to measure it with an oscilloscope. If you don't have it, measure with a multimeter.
- Measure the voltages to ground on both pins of diode D7000, when the machine is turned on.

#19 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 12 February 2024, 21:46
1) Bateria ma 3.1V
2) Image
3) Nie mogę namierzyć tej Diody na płycie.

#20 Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Golima 14 February 2024, 07:37
UP

Re: 6050A2637901-MB-A02 | HP EB 840 G2 | Wentylator pełne obroty


by Google Adsense [BOT] 14 February 2024, 07:37

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