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  1. #1
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    Default Help Needed Flashed the wrong firmware for Garmin Nuvi 42/52 LM is now looking like Nuvi 40/50

    Hi im new here.

    I had an issue after updating my maps from openChestmap.org and Openstreet Maps/ Es Mapas.alternativas for Garmin Nuvi 42Lm which I use for driving frequently.

    Ive had the device since 2014 it got bricked followed the steps to unbrick it I realised the maps were corrupted and went to a bootloop and coudln't be detected on the laptop PC. until I used Cure3.rgn & updater.exe to remove the files.

    However I was successful unbricking the device took me 1 day to figure it out but now my interface is looking like a previous older model Garmin Nuvi 40/50 series instead of Nuvi 42/52LM series which has more features and I cant seem to revert it back to the original firmware.

    Ive used express and webupdater ive searched various .GCD files for the Nuvi 42/52 Lm both on the official Garmin website and 3rd parties but none of them seem to restore it back to the original firmware and GUI which is important.


    If anyone can assist me with the .rgn file for the Nuvi 42/52 Lm series so I can flash it with update.exe would be of great help or any suggestions getting back the original firmware

    I didn't realize that I downloaded the wrong .rgn file which was meant for the 40/50 Nuvi series since the 42/52Lm uses .gcd which is used with express/ updater

    Ive tried converting the .GCD to .RGN without success and have asked Garmin to assist which may take upto 3 days

    Many thanks

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  3. #2
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    Hi
    what do you have in Nuvi/About as model number?

    Nuvi 40/50 and nuvi 42/52 load a different HWID firmware.
    [Only registered and activated users can see links. ] --> HWID 1350
    [Only registered and activated users can see links. ] --> HWID 1613
    What was your nuvi original HWID and what is now?
    You can try to flash the correct .rgn by Updater.exe in preboot, just drag the gcd in RGNTool and click on RGN button (upper left corner of the program) save it and flash.
    Flashing a wrong HWID usually hard bricks a nuvi, but if it still works, you can try.

    I guess you don't have NV backup, so IMHO if you lost model number in NV, it is almost impossible to restore it, unless you find a smart guy with your same nuvi model a service cable and some skills enough to prepare you the files to send you to flash them by sd.
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  4. #3
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    Update, looking here:
    [Only registered and activated users can see links. ]
    You are lucky, they share the same PCB so no problem. Flash 42/52 fw and you'll get back your features
    [Only registered and activated users can see links. ]
    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]
    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  5. #4
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    Hi CatyMag

    thanks Im still learning about hacking the device,
    I cant remember honestly was trying to unbrick the GPS device after a corrupt map update

    I have the .GCD to .RGN tool
    one the device is seen as Nuvi 40/50 when I want to flash it using preboot
    secondly I get errors it isnt successful reverting back I will post a screenshot

  6. #5
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    [Only registered and activated users can see links. ]

    [Only registered and activated users can see links. ]

  7. #6
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    As said these devices are identical hardware, indicated by same PCB P/N. Therefore it can be flashed back to 42 HWID 1316 as easily as you flashed it to 40 HWID 1350. The problem you are now having likely relates to the cable or USB port you're using. If so, you're fortunate that the fw you're trying to use didn't flash because it looks that you've got hold of ASIAN firmware, specifically Singapore/Malaysia version 2.50 for nuvi 42. So unless you have a SG/MY device get the right US/EU firmware and try again: [Only registered and activated users can see links. ]. If you continue to have problems flashing it, change the cable and ensure you're using a REAR port of the PC directly [no hub]. Use of an RGN naming of OUT.rgn or any naming other than the fail/safe naming convention of <hwid>01000<swv>.rgn FORCES the flash. Fail/safe naming WON'T flash unless the firmware HWID and device HWID match.

    You need be very careful when flashing firmwares to use the CORRECT fw for the device and to use the appropriate naming.

    PS: US nuvi 40 and 42 have same features, only the GUI and Icon styles differ.
    'Thanking Posts' are banned. To thank someone, and/or to see hidden links and content, use the [Only registered and activated users can see links. ] button below left of the helpful post then refresh your browser [F5 key]. 'Thanking Posts' are banned.
    Please don't spam. Posts serving no purpose other than to thank or to ask about hidden links are trashed or deleted, it's GPSPower's policy. Please don't spam.
    [Only registered and activated users can see links. ] should make their first post as a new Intro Thread in [Only registered and activated users can see links. ].

  8. #7
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    hi Neil I tried using Garmin express & web updater too for the GCD firmwares for Nuvi 42/52lm it seemed to look like it worked when I saw the firmware installing only to fail & look like the Garmin Nuvi 40/50 series GUI. instead of the 42/52LM

    my mistake was to flash the 40/50.GCD/.RGN files which I followed instructions on Garmin's website

    Code:
    Please Login or Register to see the links
    the updater.exe sees my device as a 40/50 series instead of 42/52lm which is identified in Garmin express.

    I noticed when I get the US/ .GCD firmwares using Garmin web updater & follow the preview link before installing it takes me to Garmin website showing Garmin Nuvi 40/50.GCD files instead of 42/52LM which is either x2 & x4.GCD ver4.00 Or Nuvi 42_52 SGMY.GCD / Nuvi 42and 52_GCDFile_340.GCD

    which I've been downloading & flashing with web updater since I can't convert them to .rgn files successfully with out it giving errors as shown in the screenshots above


    I feel the features differ because the 42/52lm had more options in the settings & split multitasking abilities plus a newer OS feeling like windows 8 compared to XP

    OK the device is made in Taiwan but it's the USA version bought it in Boston

    007-002276-00 Rev C 170-01202-00 from the box

    m/n nuvi 42

    serial code: [removed]

    I need a walkthrough with .GCD-.RGN converter tool to revert it successfully to the right firmware which I'm willing to learn if anyone is kind enough to give me directions that's where my challenge is.
    Last edited by Neil; 15th July 2016 at 05:33. Reason: remove device serial.

  9. #8
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    I've also studied the Garmin device.xml

    I've studied the Garmin device.XML

    [Only registered and activated users can see links. ]
    Last edited by Neil; 15th July 2016 at 05:39. Reason: remove UID from images.

  10. #9
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    A little unsolicited but kindly-meant fatherly advice: Stop flashing everything you lay your hands on to this goddam device or you WILL hard-brick it. Already you tried to flash nuvi 42 SG/MY fw unsuccessfully and you've successfully flashed nuvi 40 cure fw from the Garmin site [BTW, your Garmin link wasn't coded as per the forum rules, i've fixed that and also removed your Serial number and Unit ID 'cos it's not safe to publicly display them].

    The device is seen by the Garmin helper programs differently because of reading either the HWID [it's now 1350 which is for nuvi 40] or it's UID which declares it as a nuvi 42. However, for all intents and purposes it is [presently] a nuvi 40 with HWID 1350.

    About your problems flashing an RGN, just download the following RAR file and extract it somewhere convenient to find 'Updater' folder [but not into that jungle maze in your CDATABASE directory, just extract it to your desktop maybe. Inside 'Updater' you'll find OUT.rgn and Updater.exe. Drag OUT.rgn onto Updater.exe and enable the radio button next to 'USB Device' on its GUI and leave the GUI visible on the desktop. First look in the device's .System folder and remove any GUPDATE.GCD file if it's present then safely remove from the PC. Next, put the device in pre-boot by holding the battery symbol on the main screen for about 6 seconds to enter a hidden menu then connect it to a REAR port of your PC. You'll see the device details appear in the window to the right of 'USB Device' and when you do press 'OK' on the GUI or just hit enter key on your keyboard and let it flash. When it finishes it'll reboot as a US nuvi 42 HWID 1613 with latest V4.00 firmware.
    Spoiler:
    [Only registered and activated users can see links. ]


    WARNING TO OTHERS: This is an 'open' RGN, it will flash to ANY device and will brick it maybe permanently unless it has PCB P/N of 105-01900, 105-01901 or 105-01902. If other users want to convert a 40/50 to 42/52 very safely use the 'hybrid method' here: [Only registered and activated users can see links. ].
    'Thanking Posts' are banned. To thank someone, and/or to see hidden links and content, use the [Only registered and activated users can see links. ] button below left of the helpful post then refresh your browser [F5 key]. 'Thanking Posts' are banned.
    Please don't spam. Posts serving no purpose other than to thank or to ask about hidden links are trashed or deleted, it's GPSPower's policy. Please don't spam.
    [Only registered and activated users can see links. ] should make their first post as a new Intro Thread in [Only registered and activated users can see links. ].

  11. #10
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    Hi Neil, sorry for that im still learning about the forum rules & Policy

    Ok ive downloaded the rar file using 7zip
    it gave an error unziping it pointing to out.rgn but the file is there without the updater.exe im assuming it to be updater.exe version 2.8 thats what i have

    I have read your instructions carefully yes there is a .sys folder hidden I have backed up the directory in case of anything goes wrong

    need to confirm if the rar file is corrupt free please see the screen shot

    [Only registered and activated users can see links. ]

    before I go ahead with the flashing process to restore the original firmware

    Im more used to flashing Roms & Custom roms for Android phones and other devices this is a new learning curve im willing to study


    Regards

 

 
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