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#1
03-25-2009, 01:57 AM
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Downgrade OS V32
Hello,
how can i downgrade the OS V32 to a lower? I got a lot of problems with my navi after the update!!! The Navi falls steadily down! And the screen is white!!! Thanks in advance! 
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#2
03-25-2009, 03:36 AM
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#3
03-25-2009, 06:58 AM
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I try it with an older ORIGINAL OS from BMW and my navi wrote that my OS is up to date!!!
How can i downgrade it??? Which version is the best for the MK4? regards, rob Last edited by roberto_nekapna; 03-25-2009 at 07:26 AM.
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#4
03-25-2009, 09:55 AM
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Simply insert lower version OS disc, making sure you know what version you have now and what you want.
Remember the difference between OS and nav versions: V32 & V31 = 4-1/100 V29 = 4-1/91 V28 = 4-1/80 etc
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#6
03-26-2009, 06:13 AM
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Any version that is DIFFERENT to what you have loaded now, will reflash the nav
eg if you used OS CD V32, you would have loaded 4-1/100 So choose any OS CD that holds a version that is DIFFERENT to 4-1/100 and when you insert it, the software will load.
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#7
03-27-2009, 12:16 PM
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Hello,
i try to install a new OS but nothing worked!!! My screen is blue and i can't controll my navi! What can i do to repair it??? Bilder-Upload.eu - Gratis Fotos fьr Freunde, Foren und Auktionen hochladen 
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#8
03-27-2009, 12:31 PM
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The system has detected that the nav is not talking on the ibus, and the video module (TV Tuner) has taken over generating the graphics for the display. The nav has stopped talking because it has crashed during the software update. Maybe you had a corrupted OS disc, low car battery voltage, or wrong mode OS disc, or simply bad luck.
So you are now looking at the output from the video module, not from the nav. Normally, a Mk4 nav does not crash during a SW update. However, a Mk3 WILL crash during an update if you use a Mode1 CD. What nav do you have in your car: Mk3 (CD) or Mk4 (CD/DVD)? Tip: if the nav shows DVD on the front of the unit, it is a Mk4. If you have a Mk3, then try loading software from a OS CD that you have confirmed is Mode2/Form1 format. That normally restores the Mk3 back to working condition.
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#9
03-27-2009, 01:01 PM
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I have a MK4!!! The navi works somethimes und somethimes it is blue!!! And i can't operate the navi! What can i do now?
THANKS IN ADVANCE
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#10
03-27-2009, 01:55 PM
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Then the laser may be weak, and not able to read the CD.
The Mk4 has 2 x lasers: 1 for CD, 1 for DVD Try loading the OS from a DVD, sometimes that works. If the DVD works, then consider replacing the laser or the mechanism, as the laser is getting old, tired and weak.
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