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  #1  
Old 11-19-2007, 04:15 PM
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Join Date: Nov 2007
Location: Nor-Cal
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chenja 330CI is on a distinguished road
Unhappy MK III help needed

Hi All, I've been lurking around this forum searching for the right solution for my MKIII, but no luck. Various answers but can't find a difinitive way to fix my problem without paying $2k for a new unit.

My MKIII (MY02) has been acting up lately, it'd display "no disk" even though the disk is in the drive, keeps rejecting my disk, and seems to only work half of the time. I've been told it's my battery (never changed since I bought the car), loose cables, exterior temperature, and corrupted firmware.

I will take my car to get the battery re-charged next week, but I haven't been having any problems with starting my car at all, so I don't think that's the issue. Also, the nav would work at times, so I don't think it's loose cables or bad firmware, but I could be wrong.

Can someone provide more insights into my problem? It seems that a lot of people have been encountering the same problems I have, but no real solutions (at least I can't search in the right way to find it). Let me know, thanks in advance.
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  #2  
Old 11-20-2007, 06:07 AM
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Join Date: Dec 2006
Location: Switzerland
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KiwiJochen is on a distinguished road
I have experienced the following:
When my Mk3 is hot, it will not recognise the disc. I believe this is a sign of the laser getting old. By hot, the Mk3 runs at around 40 degrees C (measured on the nav internal diagnotics)
When the car cools a bit - through driving - the disc is recognised.

So to maximise the capability of your nav to read a disc you should do the following:
1. Clean the laser with a cleaning disc that uses the wet cleaning method (with isopropyl alcohol etc).
2. Clean the map disc - this ensures maximum ability to read the disk. Ensure disc is not scratched.
3. Use an original map disc (not a copy).

All of the above helps the laser read the disk.
If your nav still has trouble reading the disk, then a new laser may be required. Realistically it is easier to replace the whole nav unit with a 2nd hand one then find a replacement laser :-)
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  #3  
Old 11-20-2007, 08:03 PM
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Join Date: Nov 2007
Location: Nor-Cal
Posts: 2
chenja 330CI is on a distinguished road
^^ what you said sounded like exactly my problem. my only question is, which kind of CD Lens cleaner should I get to clean the nav unit? They are usually made for regular CD players and they have various tracks on them, how will this work with the nav unit?

Thanks for your response!
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