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Thread: Unbricking Razr with deleted bootloader(fastboot erase mbmloader.bin) is it possible?

  1. Droid Newbie
    xtam's Avatar
    Member #
    330947
    Join Date
    Feb 2013
    Posts
    1
    Phone
    Razr MAXX UMTS SPYDER GSM
    #1

    Unbricking Razr with deleted bootloader(fastboot erase mbmloader.bin) is it possible?

    Hello, i found this thread on xda:
    http://forum.xda-developers.com/show....php?t=2006391

    In short some portugese guy erased and bricked his Razr by doing:

    fastboot erase boot_signed
    fastboot erase cdrom_signed
    fastboot erase devtree_signed
    fastboot erase ebr_signed
    fastboot erase mbr_signed
    fastboot erase mempodroid
    fastboot erase preinstall
    fastboot erase recovery_signed
    fastboot erase system_signed
    fastboot erase logo.bin
    fastboot erase mbm.bin
    fastboot erase mbmloader.bin
    fastboot erase cdt.bin_signed
    fastboot erase radio

    He erased and deleted every file on his razr so it created perfect paper weight/ total bricked phone.
    He said that it wont even power up.

    But there is one thing i am curious...

    He told that after connecting to pc through usb, :
    it recognizes only the OMAP4430 chip, and is detecting and disconnects after 3 seconds and back.

    So there is small sign of live.

    Now the person who made Boot menu manager, whirleyes,

    said this:


    This sounds like OMAP ROM Code.


    Unbricking Razr with deleted bootloader(fastboot erase mbmloader.bin) is it possible?-boot_stage1.jpg
    image from - http://omappedia.org/wiki/Bootloader_Project -- look here - there is boot process described

    Upon boot, OMAP ROM code will search for a 1st-stage bootloader.
    Probably in these location order.
    1. Internal Storage (NAND Loader)
    2. Serial
    3. SD Card

    Since you've delete your NAND loader...CPU trying the next order
    (at least give you 3 second to upload a bootloader via serial)

    There's a chance we can load a custom boot loader from sd-card

    p/s : someday when I don't need this phone.. I'll kill it this way
    If I'm lucky, I'll get to boot an unlocked bootloader.
    and later this:


    Thanks a lot for the schematics & the technical insight. Maybe we can try something in this case..

    :good:



    Dude, let's try something...

    1- Grab a Micro-SD with at least 4GB
    2- Format it to Fat32
    3- Extract & copy all the files from the 672.180.41 SBF update to it.
    4- Put it into the phone
    5- Remove your SIM card
    6- Plug the usb cable & connect to the PC.
    7- Wait to see if it loads the MBM & try to flash again, using the same files that I mentioned earlier.

    Did you understand? / VocÍ entendeu?

    :cowboy:
    but this guy is no more reachable, also he is using windows 8.

    I am curious, is it possible to recover in this way ?

    Anybody have such bricked razr to test ?
    Last edited by xtam; 02-07-2013 at 11:30 AM.
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  3. Droid Newbie
    Alchedroid's Avatar
    Member #
    341635
    Join Date
    Apr 2013
    Posts
    1
    Phone
    Motorola xt910
    #2
    I believe I have the same problem although it was caused by a wrong step during installing the d-wiz rom. I own a GSM XT910 device and I formatted my main system with the "boot menu manager" without having copied first the ROM zip in my device (yeah i know i'm an idiot)!
    Then when i rebooted I was greeted by the motorola "red eye" logo and then... nothing (no fastboot menu appears). No matter how many times I have tried to reboot by pressing either "power"+"vol up"+"vol down" or just "power"+"vol up" with or without the factory cable the result is exactly the same: the boot stops after the motorola logo.

    I have tried several methods as well as the aforementioned:
    (1- Grab a Micro-SD with at least 4GB
    2- Format it to Fat32
    3- Extract & copy all the files from the 672.180.41 SBF update to it.
    4- Put it into the phone
    5- Remove your SIM card
    6- Plug the usb cable & connect to the PC.
    7- Wait to see if it loads the MBM & try to flash again, using the same files that I mentioned earlier.),
    but no luck. The problem remains the same.
    I have also tried this: [Q] Bricked motorola xt910? Need help please!!! - xda-developers , but had no luck either. The device couldn't boot into fastboot.
    Any other ideas?

    Proud to announce that the last thread ([Q] Bricked motorola xt910? Need help please!!! - xda-developers) solved my problem after multiple times of pressing "power"+"vol up"+"vol down" en=ven after the logo appears.
    Last edited by Alchedroid; 04-02-2013 at 01:07 PM.

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