Question about Garmin zumo 550 GPS Receiver

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Display The display dose not auto dim at night. I have the color mode set to auto. How can I get the zumo to auto dim? How do I reload MapSource? Can I just up grade to a newer version?

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Re: Display

It does not auto dim, it just remembers the settings. As soon as it has a GPS fix and knows the correct time it will switch to either day or night mode, and use the last setting you chose for that mode. Just give it a minute or so to get that GPS fix.
Mapsource, you mean the one on the PC? That you can upgrade by downloading it from Garmin, If you mean the maps on the GPS, you gave to order the DVD from Garmin and pay for the unlock key.

Posted on Jun 10, 2008

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Please check the display settings, it can be set to day , night or auto in Tools>Settings>Display then Color Mode.
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If you can't see anything then it is a hardware issue. Return for replacement as soon as possible.

If you can see faint images in the background then your screen is just too dim. You will have to try to navigate the dim screen to the settings menu. Click on the Tools icon, bottom right of main screen. Click on "settings" then "display". Select brightness and adjust.

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  1. Make a backup of your Zumo by copying all the file to your computer.
  2. Using your PC and MapSource select all the maps then send them to a SD memory card need 2Gig or bigger card.
  3. Try to rename this file to gmapprom.img and replace the same named file in your zumo. (I haven't tried this personally, so if it fails, just replace this with your backup and all will be as it was.)
  4. If this fails, you can use the SD memory card in your zumo and it will use this map instead, but it will take longer to boot your zumo.

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