Help with Bios Identification

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • IamPritesh
    Badcaps Veteran
    • Aug 2017
    • 354
    • India
    #1

    Help with Bios Identification

    Please refer to the image attached.

    I have this Dell N4010 DAOUM8MB6E0 Rev E board with me which has no sign of life. 3.3V is present and nothing happens on pressing the switch button. Switch button has 5V present.

    Looking at the the schematic I am confused with Bios. This board has 2 bios . One connected to IO chip and other one to the PCH

    As of now the one connected to EC has 4MB data written to it and the other one is just 1MB.
    Have they messed up the schematic ? If so which bios IC should I use where.
    Attached Files
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: Help with Bios Identification

      Yeah there are a lot of small inconsistencies like that in schematics. Doesn't matter, the correct part number is written under the chip "MX25L8005" which is indeed a 8Mbit chip.

      U9 is the EC firmware, 8Mbit, connected directly to the EC and handles the beginning of the power sequence.
      U4 is the BIOS firmware, 32Mbit, that the CPU will run as soon as it receives power and exit reset state.

      Here since you get no reaction to power button, the issue is most likely *not* related to the BIOS. It can be related to EC firmware, so you could try to flash it.

      It can also be a number of different things as both EC and PCH handle the power sequence and are very complex chips with lots of requirements.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • IamPritesh
          Badcaps Veteran
          • Aug 2017
          • 354
          • India
          #3
          Re: Help with Bios Identification

          Thanks sir. So if I understand correctly U9 should have the 8Mbit chip ( The previous repair person has put 32 Mbit chip here )

          Also what points should I check on IO chip to move in the right direction.

            Comment

            • piernov
              Super Moderator
              • Jan 2016
              • 4435
              • France
              #4
              Re: Help with Bios Identification

              If it's not the correct chip, then put the correct chip first and put the correct EC firmware on it.
              If it doesn't have the correct EC firmware the board will not turn on.
              (having the wrong chip may or may not prevent it from turning on, no way to tell so better to put the proper one)
              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Re: Help with Bios Identification

                  Schematic is avlbl for this board. So after putting correct bios and chips,as piernov has suggested, you should check the basic requirement of kbc is fulfilled or not. Do you have RSMRST on kbc??

                    Comment

                    • IamPritesh
                      Badcaps Veteran
                      • Aug 2017
                      • 354
                      • India
                      #6
                      Re: Help with Bios Identification

                      Swapped the bios chips .. flashed it and now its working fine. Thank you so much .. You guys are awesome.

                        Comment

                        Previous template Next

                        Related Topics

                        Collapse
                        • 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
                        • jbonavita
                          ASUS TP500LA BIOS request/repair/merge?
                          by jbonavita
                          Hi, my laptop wont boot at all
                          With original bios no POST, only LED lights
                          With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
                          Some issues
                          A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
                          B- If updated from 500LN version 203 to 300, the battery stops being recognized

                          Things I tried

                          1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble...
                          04-29-2025, 09:38 PM
                        • zenius
                          [REQUEST] Dell G3 3579 BIOS Password & AMI Protected Range/BIOS Guard Unlock
                          by zenius
                          Hello, I have an old Dell G3 3579 (ST: 2WQ7LP2-8FC8) with a newer 8FC8 BIOS password. I have successfully attached to the flash chip (W25Q128JVSQ) on the motherboard with a CH341A programmer and made several modifications using Intel FIT (e.g., allow software SPI write) without bricking. I was also able to boot to a modified GRUB shell where I attempted to edit many BIOS security related options like BIOS Guard/Lock, Flash Signature Override, ME FW Image Re-Flash, etc.

                          Unfortunately, some of these modifications like to Intel BIOS Guard failed because it is fused into the PCH. Also,...
                          12-08-2024, 06:13 AM
                        • Wahaz
                          Lenovo Thinkbook 15 G2 ITL i5 (serial number: MP2BFZEF) bios request
                          by Wahaz
                          Hello,

                          I have a Lenovo Thinkbook 15 G2 ITL i5 Laptop (serial number: MP2BFZEF) that when I turn it on, the led on the power button lights up for 5 seconds, then goes out. There's no display and nothing happens.
                          So I thought it was a Bios problem.
                          I found 3 bios chips on the board, which I read with a bios programmer: two XMC model bios chips and a Winbond model bios chip. Each XMC model bios chip has two partitions named XM25QH128A [3.3V] and XT25F128A [3.3V]. And the Winbond model bios chip has three partitions named W25Q80BL 3.3V, W25Q80xV 3.3V and W25Q80DV 3.3V....
                          10-30-2023, 08:42 PM
                        • TraJikar Mac
                          [HELP] G712LWS BIOS capsule
                          by TraJikar Mac
                          I need someone that can capsulate one of the bios files below, and i prefer the older bios version so i can flash it using CH341A tool into the bios chip.
                          The manufacturer BIOS files are bigger than the BIOSbackup1.bin files by 256KB and I don't know how to fix or recompile it.

                          You can see in this link a conversation between me and other people (Starting at page 10) who tried to help me (thanks to their efforts), but i still couldn't fix it and the laptop is considered as dead until now.

                          Also, I uploaded a backup file for the bios that I extracted by using CH341A...
                          06-11-2025, 01:35 PM
                        • Loading...
                        • No more items.
                        Working...