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Hi there can anyone help me, specifically i need help in step 4! ''In the above folder copy Ldr.bin . What is Ldr.bin? It is your firmware boot.bin you can extract with RGN_tool'' . I opened the program and I assumed that it needs something to be extracted! What is that? If it is the GUPDATE.gcd from .System folder, my device (nuvi 3760) does not have this file!!! What should I do?
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6th February 2013, 04:07 PM #1Member
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6th February 2013, 04:39 PM #2Navigation software expert
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open your gupdate.gcd with rgn tool.
Beside boot.bin click on save and you will have on your desctop boot.bin
rename boot.bin name to ldr.bin
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6th February 2013, 05:18 PM #3Member
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Thank you for replying me BUT I can find it gupdate.gcd on my device!! And yes, I did all the steps which needed Windows to show the hidden files-protected files and still I didn't find it. Also, what size should it have?
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6th February 2013, 05:33 PM #4Important User
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look at html source and download itCode:Please Login or Register to see the links
For more infos see
[Only registered and activated users can see links. ]
You have to navigate to get to the good.
Galaxy S5 Kitkat 4.4.2 / Nuvi1200->1250 / Nuvi3790T->34xx / Nuvi 2200 / Nuvi 66 / Oregon 600
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6th February 2013, 05:50 PM #5Member
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Ok I got it now, thank you!!!
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30th March 2013, 12:32 PM #6Pro-Member
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Is there no other way to backup NV if I don't have a micro-sd available?
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30th March 2013, 12:33 PM #7Important User
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No. buy one, few bytes to write, few gb sd are very cheap.
You have to navigate to get to the good.
Galaxy S5 Kitkat 4.4.2 / Nuvi1200->1250 / Nuvi3790T->34xx / Nuvi 2200 / Nuvi 66 / Oregon 600
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30th March 2013, 12:39 PM #8Pro-Member
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Ok. Yeah, very very cheap but I can't buy now. I have to wait up to tomorrow to buy and I'm wanting to backup it now. I guess I have to wait then.
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30th March 2013, 01:03 PM #9Pro-Member
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By the way, if I flash different firmwares on my 3790T (including the 34xx firmware), I am not corrupting or changing any unique device information contained on the NVRAM of my device, right?
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30th March 2013, 01:18 PM #10Navigation software Moderator
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kevindd992002
By flashing non-standard firmwares you can corrupt some important NV records which would make the original firmware crash on some conditions. In order to repair it you will probably have to erase your NV, thus loosing your device's model number (3760, 3790), restoring which is quite cumbersome So, make an NV backup before you start doing anything. It's a useful skill in any case.
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