macpap

Hi,

I have messed up with my 765 trying to copy a map image into the unit. The problem I am facing now is that I am unable to see the unit as a usb drive. Tried all the "keep the power button pressed (actually her it is a slide button) and hold the upper right corner of the screen" procedure people suggest in various forums including this. However it wont work on my nüvi 765. Any ideas ?? Actually what id need is a way to see it back as a drive to remove this stupid map.

Thx in advance to all that may be able to help....

macpap

apparently there is none

HumVee

Hi, macpap. Sorry for the lack of response - apparently nobody has come across exactly your GPS failure symptoms before. Is the unit able to boot? If it's functional, but you can't get it to recognize a USB connection...I'd wonder about the USB cable. Do you have a different USB A to Mini-B cable you can try?

macpap

Hello my friend (->Humvee)

thank you for responding to this. Of course I understand that no one did have the answer since there is allways a first to some problems. ( )

That being said...

Question = Is the unit able to boot? Answer = Yes

Question = Is the USB connection ok? Answer = Yes Cable and port checks out (tried several cables and computers that worked before)

Now to my request. For other units there is a sequence of keypressing and/or sometimes positions on the screen you have to keep your fingers on, so that the unit does enter what is called a "pre-boot mode". That way it does not boot normaly nor checks the data on the units flash memory, giving you the ability to see it simply as a drive and do whatever you need to do, even if there is a problem with the data stored on it. In my case a faulty map.

I hope now it is more clear what the problem is I am facing. All I need is that "magical and mysterious" way to enter the preboot mode for the 765 nüvi.

thx again...

Walker1940

I have a 755t. When I plug in using the USB cable the Garmin unit automatically shows up under Computer as Garmin nuvi (F and shows all the folders in the unit. The gps unit displays an icon showing a gps unit connected to a desktop by a usb cable. I am surprised that any other bootup is required to show the unit as a disk drive.

macpap

Hello Walker.

what you describe is the "normal way" and yes that is how it normally is done. Unfortunately it would seem that the Garmin software does make a check to see if all is all right on the units memory even if used as a "usb drive". So if something like in my case is NOT it ends up in an endless reboot loop. Therefore i need that "magic pre boot mode"

HumVee

This forum has some rather alarming reports of nuvi's failing to boot after firmaware updates - just in the past several days. I don't know if you did any firmware update of your unit just before your recent issue cropped up - but perhaps the two are related. If not, some of the suggestions I saw on the form for trying to restore a nuvi that isn't booting properly is:

• Try to install an update using the Garmin web updater tool. This may reset corrupted files and allow your device to boot fully again.
• Disassemble the case and unplug the battery for at least 30 seconds to lose any erroneous code that might be sitting in system memory.

Otherwise you may want to contact Garmin ASAP and see if they'll own up to the issue and will RMA your device....

macpap

Dear friend,
thank you for your time
however I am aware of the firmware problem and this is not it. to update the firmware however one has to see the device on the PC and it never comes to that due to the constant reboots of the unit. I tried the battery. But its a faulty corrupted file i have a problem with so as soon as the battery is back on the problem is there it wont go away cause what i need is to remove the file as i said.

Anyway i don't want to steal more of your time. IF some one has the way to enter the pre boot mode in a nüvi 765 I would be great full otherwise i will have to ship the unit to Garmin.

Thx to all

macpap

I wonder if someone has found a way to enter the preboot mode for the nüvi 765

HumVee

This forum discussion talks about pressing the power button and keeping it held down while the boot screen comes up, and while keeping the power button depressed plugging in the USB cable (which is already connected to the computer). Perhaps you might want to give it a read and try it out. The discussion goes on, but I don't have time to read all of it....

Max

hmm...hit power button wait .25 seconds and put my fingertip in lower right corner, comes through bootstrap and asks to delete all my user data. I think thats step 1 in this fiasco.


But a better question is, what were you doing that got you into the mess? Nuvi 765 is new...I assume it would have new maps? so what maps are you trying to put on...maybe if we know what you put on or did, we can figure it out better.

Yes I've killed a nuvi by mucking with the gpssupp map img but...never to the point of not being able to use it as a drive, that sounds like a trip to Garmin is in the works.


edit: by the way, the upper process (pressing right corner hitting power button) DID resolve my issue of my Zumo 660 appearing to be dead to the world...it wouldnt connect via USB or anything, it just stuck in reboot...and that fixed it.

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Nothing free is good, nothing good is free.

macpap

Ok nice to see that people are still interested. Btw it did not work for the 765. :-)

Just for the story. My 765 was and still is quite new (less than a year old). However not everybody lives in the US or North Europe (smiles). So the Maps needed to be uploaded were those of Greece which was not covered by the CityNavigator EUrope 2009 (not true anymore in CN 2010). I hope that answers the question.

Actually it was not a trip to Garmin cause apparently they (the representative in Greece) were as puzzled here as I was. So I had to try different things. The one that solved the problem was to use a good map name it gmapsupp.img put it in a sd card and reboot with the card inside the slot. Apparently the device looks first to what is in the sd card and then loads what is in the unit. SD card is more important then the units memory itself. That way the 765 came out of that endless loop and I could use it as a drive to get rid of the faulty map.

However despite the fact that I solved my problem and regardless of why and how i got there the question remains how does someone enter the preboot mode on a nüvi 765.

Thank you all

Kostas

Max

yes, this is true...

Ok , I cannot figure it out yet....but I will. Glad to hear that you did get the map issue sorted though

__________________
Nothing free is good, nothing good is free.

macpap

:-) I hope you do Obiwan!! You are my only hope... :-)))

HumVee

macpap, I Googled your question, and see you've been busy asking your question all over (good for you), but not getting a satisfactory answer. Have you seen this mode you speak of before? Because all of the responses I've seen are talking about the hard reboot / factory reset - and you seem adamant that's not what you're interested in. I've never seen a "DOS mode" or "BIOS mode" for Garmin devices, like you'd see on a personal computer.... Have you tried contacting Garmin Support? They should be able to provide a definitive answer, and then you could post back here what the answer is!

Max

I have seen this mode before but only on the older model Garmins...haven't been able to get into a screen like that since the xx5 nuvi models have come out.

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macpap

-yes been busy bee but no honey found lol
-No I hve niot seen on a 765 many site thogh report that there is one holding the start key for 30 secs or so on a 660 for example.
-It is not if I got it right nothing lioke a DOS or BIOS mode. It simply bypasses any boot sequance in the nüvi and mounts it as a mass storage device like a card reader. There for ignoring everything that is on the device.
-No I have not contacted them in the US here in Greece they have no clue what so ever. They did not even know about the switch holding trick. At least that is what they said.

Exactly my point...

HumVee

Garmin Support is international. Just use the e-mail link on the site and pose your question. Response to your e-mail is typically 24 hours.

Max

There is Garmin Europe, Asia, and Kansas USA...sounds like he reached the Eu office.

What I was going to suggest is try contacting Garmin USA...they have sometimes been more helpful to some people

__________________
Nothing free is good, nothing good is free.

macpap

No tried to reachthe loca office not even europe I will try to reach US though you are right :-)

dlwray

Have you tried uninstalling the drivers on your pc and then reinstalling, then booting PC with nuvi connected?

HumVee

I would use the e-mail link. They have no idea (& wouldn't care) where you are in the world.

macpap

I have not and won't. This is not a problem on the PC side cause I could be on a Mac or a LInux system or whatever. The problem is not On the PC (tried as i mentined severall PCs. The problem is how to make the nüvi act as a Mass storage device by bypassing any boot sequence it may have stored in its flash memory. And YES when you plug it on a PC and it starts acting as an MSD it allready has booted and checked what is on it memory and that is what I want to bypass. I repeat what is needed here is the way to make the nuvi bypass its normal boot sequence and get into what is generally known as preboot mode.

So unless someone has an answer to exactly that please don't make this thread longer than it should be.

Done this morning!!! :-)


Thx again to all

Alex74

I have the same problem with my 765...

How did you fix it?

macpap

Update

As of 12th September 2009 No answer from Garmin yet...

-> Alex 74

Alex74

This doesn't work for me... It is the same.

Any other idea?

macpap

-> Alex74
If it does not work for you than propably you have a different problem than I had. Could you describe yours?

Kostas

PS still no answer from Garmin....

HumVee

macpap, if it's been more than a couple of business days (& it has), I'd resend your request - sounds like it got lost. Out of the dozen support e-mails I've initiated with Garmin, I've only ever had one go astray - and it was answered on the second request.

Alex74

Kostat, I did the same thing as you. I pick up few local maps that work 100% on all other Nuvis and send them to my 765. The transfer vent OK and when I removed Nuvi from USB it started to loop. It loads maps and reset and again it loads maps and then reset. It is the same thing when I conect to USB. Nuvi starts, whrite on displey Loading maps, then the USB mode display apears and them Nuvi restarts. And it never stops.

I did as you describe and put on SD card fresh copy of my map. The story repeats...

macpap

well actually i had the problem with only one map namely the gmapsupp.img and it worked. I am afraid that is what i did and I am sorry that I can't help further :-(

Maybe the unit cant load all sets of maps from the SD. for example i never got the gmapprom.img to work from the SD.

I guess what is needed is this preboot mode on which Garmin has still not answered (not thart I am surprised)

Kostas

PS UPDATE just got message from Garmin

"This is an automated reply, please do not reply to this email.
Due to your country of residence, please contact your local Garmin office as listed below for further assistance. An online list can also be viewed here: www.garmin.com/dealers,,,,"

yes very polite and accurate. Ill send another mail.