FULL BIOS ROM for HP NC6400

Discussion in 'BIOS Mods' started by hubh, Oct 17, 2012.

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  1. hubh

    hubh MDL Novice

    Oct 17, 2012
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    When I flashed the bios on my HP nc6400, there was an error at about 20%, and my nc6400 is bricked. I have desoldered the bios chip mx25l8005, and read and backed up the old one. I also download the bios from hp.com 68YCD.BIN. It looks to me that the first 64kB is different. 68YCD.BIN is FFFF, but it has some code on my backup. Does anyone have a full rom that I can flash back to the mx25l8005 and install it on my nc6400?
    Thank you very much.
     
  2. akuma6099

    akuma6099 MDL Novice

    Mar 20, 2012
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    Can you up a copy of your dump to somewhere? It seems we can piece together a working rom. Also what version bios did you have orginally?
     
  3. hubh

    hubh MDL Novice

    Oct 17, 2012
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    I have uploaded the rom here:www-sendspace-com/file/jc9hdb. The previous one was F.0A, and the new one is F.0B.
     
  4. akuma6099

    akuma6099 MDL Novice

    Mar 20, 2012
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    I wipped up 3 different copies. The first 2 contain your system data still. The 3rd one is a blank which means you will have to configure your product number and serial using NbDMIFit. Latest version is 1.19. it's floating around. Try them one at a time and let me know if it worked.

    sendspace.com/file/sy8epw
     
  5. hubh

    hubh MDL Novice

    Oct 17, 2012
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    I have figured that it takes some effort to replace the bios chip. And whatakuma6099 did is combining the first 64KB with the official bios. So I have combined my first 64KB with the nc6400 bios (ATI) from
    HP Compaq nc6400 Notebook PC (ATI) (version F.0B 05-sep-2007) with slic 2.1 and whitelist removed.
    and flashed it to the bios chip. sendspace_q7zp07
    It works fine. Now my nc6400 is working again.

    I believe that copies from akuma6099 should work fine.

    Thank you. akuma6099.
     
  6. akuma6099

    akuma6099 MDL Novice

    Mar 20, 2012
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    I wasn't 100% sure which is why I asked you to up a copy of your dump. The dump and the BIOS rom from HP are the same size. You can just flash the HP rom directly and away you go! Sometimes you can copy your system data in so you don't have to set product, serial, and AMT. Sometimes there is a checksum that needs adjustment and it is easier to just blank out your system data. I have played around with a few different laptops. I just fixed a dell D630C that somehow was flashed as a D630. The D630C BIOS ends at version A11. This one had A17. I removed the flash and dumped it. Did a "D630CA11.EXE -writeromfile" and flashed the rom file directly. All took. I then reran the flash through dos to adjust the KBC rom. Works great. I tried flashing through recovery but it wouldn't take. I know it was reading the bin file fine, just refused to "Downgrade". Maybe I'll start a new thread for SPI Flash recovery :biggrin:

    Side Note: I had originally took the D630CA11.HDR file and cut, aligned, filled with FF's, and removed the extra program at the end. I flashed this and it worked. Then I noticed the "-writeromfile" extraction option and that produced the 2048Kb rom which matched my chopped up hdr file. Good to know...