HP 840 G4/G5 bios unlock basics + CH341A

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Roar
    New Member
    • Apr 2023
    • 2
    • Poland

    #1

    HP 840 G4/G5 bios unlock basics + CH341A

    Hello
    I've got a chance to buy a hp 840 G4 and G5. Both have passwords set, one on bios, other one has boot password.
    After 2 days of searching for useful info with unlocking using only software I gave up, as I've seen on HP forums that they send to HP support, and then people get "you need to contact hp certified service".

    RethoricalCheese's reply in other thread made me sure that getting smc.bin is a song of the past.

    Originally posted by RethoricalCheese
    Using SMC.bin files was stopped in 2019. Get yourself a programmer and clip or find somebody who has them. No other way.
    I'm not into soldering anything as my old soldering iron will make more harm than solves things, thus I am wondering about a cheap programmer with a clip.
    "How to dump a flash" thread covers that matter, but anyway dumping bios with a CH341A through a clip like the one on attached img is possible after couple trials and errors, without harming the eprom?
    I've went through whole thread about programmers and to be honest I won't spend more on a programmer than on a used laptop :\


    What else do I need? Could you point me to a "howto for dummies" explaining mentioned software in dumping flash thread. I suppose only that I should use RCunlocker on a dumped bios?

    Using search gives way too many threads to click through and after reading the forums back and forth since yesterday I became dumber than I was before :\
    Attached Files
    Last edited by Roar; 04-02-2023, 07:06 PM.

Related Topics

Collapse

  • EbrahimSiami
    Acer Aspire 5920G - Requesting Modded BIOS (9600M GT) from .WPH for CH341A Flasher
    by EbrahimSiami
    Hello everyone,
    I need help with my Acer Aspire 5920G laptop. Its original GeForce 8600M GT graphics card failed, so I replaced it with an Nvidia GeForce 9600M GT MXM card.

    **Problem:** The laptop powers on, but there is no display (black screen) on either the internal LCD or external monitor. This indicates a BIOS compatibility issue with the new graphics card.

    **What I have tried so far:**
    1. I have my **original stock BIOS dump (1MB .BIN file)** from my laptop, which works and allows the laptop to power on normally (but no display with 9600M...
    07-02-2025, 02:31 PM
  • hotcrossedbuns999
    M715q Desktop (ThinkCentre) - Type 10M3 - Request bios chip location and useable bios for use with CH341A Programmer.
    by hotcrossedbuns999
    My pc updated bios through Windows Update and I was greeted with BLACK SCREEN WITH CPU FAN MAX SPEED. I don't think there is even a screen signal, because it triggers my monitor for a couple seconds and then the monitor turns off. I tried the other outputs as well.
    1. I tried clearing bios, resetting bios, removed the CMOS battery, removed m.2 ssd, wifi, and ram. Still black screen with CPU fan blasting.
    2. I tried using the Lenovo BIOS CD and BIOS USB, but neither worked. At least I couldn't get anything to work.
    3. I could only locate two chips that look like bios chips. Could someone verify this
    ...
    01-03-2025, 12:32 PM
  • Vesko356
    [Guide] How to find the right HP bios version to flash
    by Vesko356
    First of all thanks to all of our members who have posted previously all methods posted here.
    Please leave a comment if you find something new,or have anything else to add.
    -----------------------------------------------------------------------------------------

    Find by serial number,model number or series

    If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
    Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
    Operating system and OS version.If...
    08-11-2023, 03:27 AM
  • salim5566
    loking for bio tool that hve all feature like ps5 bios and laptop bios unlock and repair 1 tool can do all please good tool?
    by salim5566
    Hi guys i like to buy tool that automatic unlock bios or find password also can flash and repair bios ic, looking for good tool have good software that have 1 click and unlock bios any recommend good tool? looking for sony ps5 and and laptop bios
    Thanks
    06-26-2025, 03:25 PM
  • remizbushka
    Dell inspirion 5775 bios "Unlock Setup fail"
    by remizbushka
    Hi sirs. please help
    Dell Inspiron 5775 bios locked "Unlock Setup fail"


    After generating the Password Recovery code, I go to the “Security” tab - “Locked Settings” - it says “Unlock Settings? I tried many wrong passwords and it shows an error to unlock settings [ Press any key ].
    What I did:
    I read the bios dump.
    Downloaded the bios update to 1.6.0 from the official Dell website, extracted the dump from it, updated the bios, but the problem persisted. Please help me to solve the problem....
    03-24-2025, 09:07 AM
  • Loading...
  • No more items.
Working...