Yes. I tried this, but I can't access booloader menu (blue screen) to update firmware. I read that model C720 or all C series have some "problem" with accessing boot menu. There is method gnd+pin9, but as I am informed, that will not working because I already have an orange screen issue.

Anyway, I found some stuff about making JTAG on C series, so I will go to study it bit by bit.

Thank you for your suggestions

P.S.
Have you ever access to blue boot menu on your c320? If yes, how?

BUGkc wrote:Yes. I tried this, but I can't access booloader menu (blue screen) to update firmware. I read that model C720 or all C series have some "problem" with accessing boot menu. There is method gnd+pin9, but as I am informed, that will not working because I already have an orange screen issue.

Anyway, I found some stuff about making JTAG on C series, so I will go to study it bit by bit.

Thank you for your suggestions

P.S.
Have you ever access to blue boot menu on your c320? If yes, how?

Honestly, I have never needed to update firmware or do anything to my C320 other than modify the unlock. Incidentally, my unlock[s] are for version 3.3 but if you can't access, I don't know what to say. Obviously, you know what you need.

EDIT: I don't know if this will help. I can't tell if it's only for the MOOV series. http://www.navitotal.com/showthread.php?7414-My-Mio-device-won-t-boot-or-connect-to-USB!

I solved my problem using JTAG procedure. With JTAG I got blue upgrade screen and then I installed new firmware (winceimg).

Thanks for the update, Maybe a how-to guide could be useful for others...

Of course.

On next link:

Code: Select all

https://rapidshare.com/files/2747556340/RecoverMioCX20.zip

or

Code: Select all

http://www.4shared.com/file/JAIsslVX/RecoverMioCX20.html

...there is a very good tutorial + required tools + required data (uboot, SPL, ipl..). The only thing more you will need is ROM version for your device (winceimg)

In pdf tutorial everything is explained in detail (how to open device, which cable to use, which resistors to use, which tool and data to use in specific case etc.). There is two way of JTAG procedure; short way and long way. If first short way doesn’t work (as for me), there is long way (about 2h). After that long way I got blue upgrade screen.

BUGkc wrote:I solved my problem using JTAG procedure. With JTAG I got blue upgrade screen and then I installed new firmware (winceimg).

Hi, i have same problem, can help me to how repair my device?

In my previous post there are links how to repair it.

To everyone having problems with their Mio C720 device. I have NO idea if this will work but right now you kinda have a brick so why not try. A C720 uses MioMap 3.3 as its operating system. If you can get into the internal disk via USB try putting this download on it after deleting everything else.

http://www.navitotal.com/showthread.php?3290-My-3.3-internal-Flash-drive-with-the-Mio-unlock-already-contained

EDIT: I seriously doubt that the above will work. The above procedure [post #15] seems quite involved - I downloaded it. Unless you can devote a lot of time, it maybe a lot easier just to buy a new device. They're pretty cheap right now unless you go deluxe.

Procedure: [Please Register or Login to download file]