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  #41  
Old 04-01-2010, 02:07 PM
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KiwiJochen is on a distinguished road
How did you manually reflash the dead Mk3s?
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  #42  
Old 04-01-2010, 07:07 PM
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autotronic is on a distinguished road
Well done Cream!

Lets give Wetzlar some competition.
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  #43  
Old 04-02-2010, 01:23 PM
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Quote:
Originally Posted by KiwiJochen View Post
How did you manually reflash the dead Mk3s?

The "hard way". Desolder flash chips, program into suitable programmer, solder back in place. I used a cheap programmer (willem true usb gq-3x) with minor modification to the software.
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  #44  
Old 04-03-2010, 04:25 PM
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ah i wish i knew half the stuff you guys know. im in need of reflashing my nav. all of the symptoms are there. old basic screen, missing gps in menu, no power light, just eject light on nav. happened after my battery was drained..

i live in the middle east and i have no idea what to do. dealer and indys want me to get a whole new radio/nav.. they dont know anything out here.. anyone close by that i can send it to for a reflash?
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  #45  
Old 04-04-2010, 02:15 PM
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cream is on a distinguished road
I live in Romania, a country somewhere in Eastern Europe . It's not so close to your destination neither too far. I didn't start a repair service so far but I'll try to help you. If you're willing to pay the shipping price (roundtrip), you could send the unit to me. We can use an escrow service if you feel like it.
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  #46  
Old 04-05-2010, 02:05 AM
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really? you would do that for me. and software update as well? i'll contact you through PMs. thanks again
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  #47  
Old 07-22-2010, 06:34 PM
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How do you manually reflash a dead Mk3? Does it require technical equipment?
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  #48  
Old 07-23-2010, 01:05 AM
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KiwiJochen is on a distinguished road
Unsolder memory chipü
Place chip in EEPROM flasher adapter
Load EEPROM file into chiü

So yes, technical equipment and technical skills required.
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  #49  
Old 09-23-2010, 02:45 PM
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Location: Virginia
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Hello all,

I have read this thread with great interest as I have been helping my neighbor with his flaky MKIII Nav computer in he E39. His issue seems very similar to the one(s) described here and I was hoping to get some advice on what to try next.

The Short Story: Neighbor left his car running--Car runs out of gas and quits--battery goes dead from key still in ON position before owner realizes what happened.

The only thing left to sort out from this mishap is what brings me here. As you already have guessed the MKIII nav computer is the issue. Here is the description of what I have seen happening with my neighbors car and need the Guru's here to help me narrow down where the problem is and what my next steps should be in troubleshooting this for my neighbor. I do not have Nav on my E46 but my neighbor sees me doing all sorts of things to my BMW and considers me an expert in BMW land. I just want to save him a few hunders dollars if at all possible.



Description of Problem:
  • MKIII nav with the widescreen monitor in the dash screen goes blank shortly after is starts. All other functions work properly. Radio, cd, tape, etc just cant see anything on the screen.
  • Upon powering the nav (either by turning key on or opening trunk/pressing eject button once) I see the red light on the nav computer come on solid, disc spins, red light blinks then goes out after a while, then this whole process starts again. My description would be that it seems to be continuously rebooting.
  • On the monitor screen while this is happening I ALWAYS see the ====BMW==== logo and sometimes get as far as the [Accept] screen. before the screen goes blank.
  • If we are fast enough before the next 'reboot' we can press the button to accept and get to the next screen. Never enough time to get any farther.
What I have tried/havent tried:
  • I have tried removing the disc and that does not change anything. Behavior is the same.
  • I have unplugged the nav computer completely making sure all wiring connections are secure and that did not change anything. Behavior is the same.
  • I have not tried holding down the eject button to see if that makes a difference SO this is next on my list of things to try.
  • I have not tried to hook my DIS/GT1 Laptop up to his car to see if there is anyhting to see. Unsure of even what to try other than look for obvious errors pertaining to the Nav computer.
  • I have not tried to make a firmware CD and try to load firmware. Unsure of whether that is even an option considering its current behavior. Didnt want to make matters worse.
  • I have not opened up the enclosure to look for any corrosion/water damage.
Questions for the gurus:

Given my description(s)
  • How likely is it that the flash/boot rom chips are corrupt?
  • If the boot rom is not likely corrupted what is the next likely cause of this behavior and what to try next.
  • What stage in the whole startup process is the unit getting to? If I knew what the process was I that would help me to better pinpoint where the trouble is I would think.
  • If holding the eject button down changes the behavior by preventing the NAV module from rebooting like someone else posted--What does that mean? Where should I go from from there?
Any help/insight would be greatly appreciated!

Last edited by GCoop; 09-23-2010 at 03:02 PM.
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  #50  
Old 10-03-2010, 12:29 AM
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Location: Los Angeles
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Terabass is on a distinguished road
What EPROM flash adapters do you recommend?

Does anyone have the MkIII EPROM code/firmware so I don't have to dismantle a good MkIII?
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