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  1. #121
    Member + An updated guide to enable JCV, Highway Mode, Lane assist & TTS on 2x5w
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    Yes, thatís exactly what I did, I was able to put it back but it was driven by curiosity and I was trying to do a complete makeover. That's the end of it. Thank you for your cooperation!

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  3. #122
    Master Butters's Avatar
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    Jul 2017
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    As i guessed. The reason to flash with hybrid fw first is to see if the device exhibits any unwanted behavour or inability to start normally. If it does so, then it's always possible to flash back to original fw because the region mapping and HWID are unchanged. Unfortunately if hybrid fw causes problems like you experienced then a full conversion by flashing complete fw can often irretrievably brick it.

    Try removing the battery for a while, there's a small chance it might re-start afterwards.

  4. #123
    Junior Member
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    I wanted to try this conversion, so I bought a lot of 255w's, HWID=0827 from EBAY.

    Conversion procedure & files from Butters, Post #79 worked great on 4 of the 6 nuvi's, Flash_Kit_0827_Hybrid_RGN.

    Conversion failed multiple times on 2 nuvi's & they had FLASH P/N 575-A0104-XX.
    They failed with a locked Garmin Logo screen & would only power off by sliding power sw for about 10 seconds.
    They were easily restored by flashing with provided Flash_Kit_0827_RGN.
    As suggested, older firmware may be needed to flash some units, but PouchX flash couldn't be located.

    Couldn't get into pre-boot with holding top-left corner of screen on 1 of the units that had a bad battery.
    It would only power up with USB connection. Putting unit in Diag. mode before plugging in USB cord solved issue.
    Converted Nuvi's were left as HYBRIDs following suggestion from Butters & Neil.

    HEADER PCB P/N FLASH 1 P/N
    =========== coverted ====================
    S3 P1 V6 105-01392-00v6 575-A0095-XX
    S3 P1 V6 105-01392-00v6 575-A0095-XX
    S3 P1 V6 105-01392-00v6 575-A0104-XS
    S4_R P2 V2 105-01392-03v2 575-A0104-XS
    =========== could not covert =======
    S2 P1 V6 105-01392-00v6 575-A0104-XX
    S3 P1 V6 105-01392-00v6 575-A0104-XX
    Last edited by zuvicon; 24th July 2020 at 09:00 AM.

 

 

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