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What't the difference between the two methods? I don't mind following either one. What I hope to get out of it is not so much the nüvi 456 but the learning experience. Important for me is that I have a clear view of the path to walk down: doing the necessary homework myself by reading up instructions and where necessary receive guidance that is not open to misinterpretation. As I am still a novice in the field of FW modding, I do not always know which parts of the Tutorial Section are relevant to my issue. But each day I learn more!Originally Posted by Neil
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Thread: Enable TMC in a nüvi 250W
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20th January 2014, 05:45 AM #1Important User
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20th January 2014, 12:08 PM #2Garmin/GPS Systems GMod.
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Imho, using the 0827 boot bin is easier and safer for laymen. Please don't do anything further if you're uncomfortable with a further conversion, but my attitude is 'wothehell'. Your unit is worth sweet-b*gger-all anyway. I can buy 255W for $20-30 depending on condition and 250W are worth even less. Originally Posted by smokefree
What't the difference between the two methods? I don't mind following either one. What I hope to get out of it is not so much the nüvi 456 but the learning experience. Important for me is that I have a clear view of the path to walk down: doing the necessary homework myself by reading up instructions and where necessary receive guidance that is not open to misinterpretation. As I am still a novice in the field of FW modding, I do not always know which parts of the Tutorial Section are relevant to my issue. But each day I learn more!
There is no tut in the Tutorials Index at present for this simple conversion but it's modding '1.01'. The basic instructions you need are in Post #28 along with the necessary files, and the specific procedure is:
1. If you have GUPDATE.GCD in your Garmin folder, remove it before doing anything
2. Drag the rgn file onto updater.exe, select the 'USB Device' radio button and leave it visible on your desktop ready to click 'OK'
3. To get the unit into preboot, hold the upper LH corner of the screen and plug the in the miniUSB to the unit [have the lead already connected to a rear port of the PC]
4. Immediately your unit details appear in the USB window of updater.exe, click OK and continue to hold the screen until 'Loader' appears on the screen
5. Let the flash finish, then enjoy your 465T.
Make sure you do the backups and reset as in Post #28 [that's essential!]. If unsure of anything, please ask.'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.
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20th January 2014, 02:31 PM #3Important User
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Where's the educational part in that?? Originally Posted by ddabcd277
Just resell it and buy a new one rather than to kill it in an experiment.
We're on exactly the same wavelength! Originally Posted by Neil
I'm well prepared to sacrifice this unit for the sake of a good learning experience, but am confident it will be successful.
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20th January 2014, 09:15 PM #4Important User
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Originally Posted by Neil
Followed all the steps, did the backup but forgot the hard reset. Result was a bricked device (frozen on the Garmin splash screen). I unbricked it (coincidentally I picked up some unbricking experience over the weekend on a nüvi 1390, which came in handy here...) and am now back at having a nüvi 250W again with nüvi 255WT capabilities. Originally Posted by Neil
Before going through the process again (but this time including the reset): by hard reset, do you mean touching and holding the right lower corner of the screen while booting up?
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