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  1. #31
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    Hi man
    I don't find any way to put the system in pre-boot .
    I have only the splash screen GARMIN.
    In my Radio there are a few sequence with buttons and reset but it's only for test mode or pre-boot of the radio system
    I already tested all the sequence in particular FUNCTION + EJECT + reset put the radio in test mode but nothing change
    So I think no way to put the garmin unit in pre-boot.
    Yes already using in my test updater and right rgn to recover "System Software Missing"
    So I start to dissasemble the unit
    Before to start any other idea to test any other software ?
    Thank's

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  3. #32
    Navigation software Moderator kunix's Avatar
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    Default

    Quote Originally Posted by jpnos View Post
    Before to start any other idea to test any other software ?
    No software will help until you enter the pre-boot mode.
    Aslo I'd suggest you to wait a few days before disassembling it Maybe someone clever comes here and tells us the right pre-boot mode combination.

  4. #33
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    Ok
    it's right .....
    this time I'm at work and it's impossible to disassemble .........
    Thank's
    Best Regards

  5. #34
    Navigation software expert Alternative firmware fo kenwood dnx520vbt
    Alternative firmware fo kenwood dnx520vbtAlternative firmware fo kenwood dnx520vbtAlternative firmware fo kenwood dnx520vbt
    lolypop000's Avatar
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    If you have system software missing on screen then you already in pre boot mode.
    Conect radio and Pc and run updater.exe and updater will see your radio with serial 0, if i think that updater will see like "Device 0"

    You must flash with updater + .rgn, gcd wont work and also wont work flash over SD card.

  6. #35
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    Hi
    no I don't have the SYSTEM SOFTWARE MISSING
    only a screen with logo GARMIN
    Other time i tested different firmware and arrive SYSTEM SOFTWARE MISSING
    connect usb and restart with correct firmware.
    This time don't arrive this but only a fixed screen with in the center write GARMIN

  7. #36
    Alexander2010
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    If you publish photo of navigation system board, I can mark testpoint pin for get into pre-boot mode.

  8. #37
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    Thank you
    this week end I dissasemble the unit and post the photo of the board inside the radio system .
    Now I am at work and is impossible to do .
    So I must extract the radio from the car and then disassemble .
    Thank's in advance

  9. #38
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    Good morning
    I just removed the radio from car and this morning I dissasemble the equipment and post
    photo of the garmin unit .
    I hope to do a good work

  10. #39
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    Hi man
    this are photo of the pcb
    Alexander 2010 I'm on your hands
    Attached Images Attached Images

  11. #40
    Alexander2010
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    Int this position can be mount pre-boot button
    Attached Images Attached Images

 

 

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