Thread: Garmin nuvi 765 "system software missing"

Hello everbody,

i hope somebody will can help me, or share similary expirience like my, with nuvi 765... I didn't find some specific thread about 765 nuvi with this problem, else this about 1xxx series

[Only registered and activated users can see links. ]

so i opened new thread...

Problem is next, this nuvi 765 had some problems with corrupted internal memory, it was fat32 FS, but however, was corrupted internal memory, symptoms were, that deleting some files weren't possible, if i deleted files, and then again power on it, files were again there, or some strange files inside some folders, like corrupted files, which can't be deleted manually... So i was afraid to format directly internal memory, and decided to flash it with latest firmware 4.50, cause rest of links here in section for 765 firmware were dead here

[Only registered and activated users can see links. ] , but caty will reupload them soon ...

I'm not sure is danger to flash from lower version like 2.20 directly 4.50, i forgot did i read somewhere that is better to update it build by build...

So i decided to risk , PC couldn't see this 765 item, OS saw 765 internal memory like hidden removable device, and sometimes was hidden, sometimes not, it made some cycles of 1-2 seconds hidden and unhidden removable device, so i couldn't flash it through usb cable, or i didn't know in that moment tip "power off, press in middle of screen, and by holding on middle of screen, turn lock on power off button, and then until hold finger on middle of display, to connect it to PC" , called action - usb mode activating, i discovered this so late ... And in meantime, i decided to flash it by SD CARD, downloaded 4.50 firmware, renamed to GUPDATE.gcd, power off device, inserted SD CARD (formatted FAT-2GB SD card), and then turn on 765 item, flashing - updating firmware started by message "SOFTWARE LOADING" wait, i flashed some my previous Garmin items, and remember that flashing firmare doesn't take more than 10-20 minutes, so i waited 30 and more minutes, but message "software is loading" was still there, no reset by itself 765 pna.

So i decided to risk again, and turned off device manually, cause though that flashing stucked on software loading, and wanted to start up once more flashing, but then bad news , message "SYSTEM SOFTWARE MISSING", and new problems...

After this, flashing by SD CARD wouldn't work anymore ... I tried 4.40 version, but no, again same message ... So i discovered way for making usb connection by some tips on gpspassion, and using GarminCure3 from kunis, i tried to reflash this item, but then appeared this message, i don't know why, and how to bypass this message and to flash device, why message for wrong region ?

[Only registered and activated users can see links. ]

I tried voyager procedure, from this post

[Only registered and activated users can see links. ]

but again same, even there wasn't ntfs formatted internal memory, i tried like some last try of something ...

So please, if somebody has some suggestion, advice, what to try, post it here ? How to bypass this message "system software is missing", it seems isn't totally dead, cause kunis's tool GarminCure3 see this item through usb connection and ID of this item, and try to flash it, but then fails, like on picture, so what wrong i do with this tool ? Or maybe i'm wrong, and this item is lost ?

Or maybe to try lower version of firmware like 2.50, which is immediately after 2.20 ?

Tnx!

Greetzz!

I'm glad you're still able to flash new firmwares, because that "unable to program the requested memory region" message occuring when flashing a normal RGN (not a manually crafted one with weird region numbers) means that the flash chip is broken.
Some devices just don't automatically reboot after flashing firmware, GarminCure3 has nothing to do with that. So disconnect the device from the PC, turn it off, and connect it back.
Also if your device is able to boot with the corrupted internal filesystem, then you don't need patching firmwares with GarminCure3. Just format it with HMPRERPUSB.

Hello Dear kunix,

thank you very much for fast reponse! I flashed it with 2.50 firmware, but after flashing is finished with GarminCure3, i pressed ok, GarminCure3 windows close, and i waited on 765 to reboot, like normally would happens , but no, it stays whole time 10-15 minutes with screen message "Loader loading", i saw that you made some modification on firmware of Kenwood, for similary problem like my in this thread [Only registered and activated users can see links. ]

So can you maybe edit this 2.50 firmware

[Only registered and activated users can see links. ]


similary you did for kenwood, to prepare some .rgn, which will bypass this message after flashing cure firmware?


I made manually cure .rgn, then by renaming all necessary files with hex editor, .img to .xmg, .gcd to .xcd, etc. like caty explained in thread for manually creating cure .rgn, but same results, at all it flashed 765, but "loader loading" still is on screen , no reboot of item, that i can see 765 in mass storage, and to be able format it by HMPRERPUSB tool ...

I hope you'll have some solution or idea what to try ...

Item is visible on your tool, and ID of 765 is visible, that on someway gives me hope that item isn't totally lost ?!

Yes, item was visible before by OS, just corrupted internal memory, but i didn't know for this tool HMPRERPUSB, and choose another way to solve that problem of corrupted internal memory by flashing firmware from SD CARD, and from that point, i get in troubles .

Once tnx!

1. Flashed with ORIGINAL firmware 2.50, this file nuvi7x5_regionfileonly__250.gcd, added in GarminCure folder, and selected "original" option, and then flashed with this original firmware, flashing finished OK, message "updating sucessfull", press ok, after finishig flashing, on screen of 765 is message "loader loading", and no rebooting.

2. Disconnected device

3. Turned off - forcibly, by pressing turn off button for 7 seconds, until it turned off.

4. Connected device back to PC, and then stupid message "System Software Missing" , and i'm again in same loop, of trying to make visible device in storage mode to PC, that i can then update firmware by webupdater.

Maybe i didn't do something good, pre-BOOT mode, i think can't get, but even that, GarminCure see this item without problem on USB port, and drivers for 765 device are installed, i tried on my laptop Win7 x64, on PC Win XP x86, same problem ...

I don't have anymore idea, maybe to try making .RGN cure firmware from original, by removing 0x66 region, like you suggested for Kenwood where was same problem "loading loader" after flashin all time ?

It's not good that after successful flashing you still have system software missing.
Try flashing this: www8.garmin.com/support/download_details.jsp?id=4357
Also it doesn't have region 0x66 inside.

Wanted to give this idea to Kunix. Hope he reads my comment. I read he made it on the firmware of other nuvis I think. And could be a solution to similar problems where there seems to be a partial damage of the the memory of the nuvi - the nuvi can be turned on, boot loader can be loaded, even the system firmware! but there is problem in the FS (0x48). Kunix can you prepare a tool where the system firmware does not read 0x48 but an SD card insted? Or this is not possible? Just nuvi to ignore reading from this part of the memory?

BTW what is on 0x66? Why are you deleting it?