Question about Garmin GPS Map 76 GPS Receiver

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MAP 76 locks up in normal mode after acquiring and starting to track, three to four minutes. Screen goes blank except for vertical stripe, no keys work. Have to pull batteries to turn off. Unit works continually in simulate mode, but I cannot upload or down load data...unit no longer recognized by computer. Stan

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  • lholcomb Oct 20, 2008

    Mine does the same exact thing. The only thing I've noticed so far is that a small metal piece where the batteries go has broken off. I don't know if there is no connection b/c the metal piece broke off or what? However, mine will still load up to the computer.

  • jim_vb Dec 03, 2008

    My Garmin GPS Map 76 is doing the same thing. It starts acquiring satellites and before it can finish locking them in the screen goes blank with only a vertical line on the screen. The keyboard becomes completely unresponsive. The only way to resolve it is to pull the battery and replace it.

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I had the same problem (blank screen, vertical line). After speaking with Garmin, I was told to turn off the WAAS function. Disable it for now, because the WAAS signal, coming from the satellite, has changed, and Garmin has not yet published a remedy to correct this problem. A fix should be out in a software update, sometime in the future, hopefully. Just so you'll know, I also did a software update, to the latest version 4.0. The unit performs perfectly now, however, the accuracy is not quite as good, due to the lack of WAAS.

What you said does make sense. When you have your unit in simulator mode, the GPS receiver is turned off, so it is not receiving signals from the satellites. The strange signal from the WAAS satellite must be what has been messing things up. Good Luck!

Posted on Dec 13, 2008

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I have a garmin GPS map 162 and during operation the screen goes blank except for a vertical line.None of the controls allow me to shut down, I must disconnect the power. I called Garmin and they sent a...


The problem is the government made changes to the WAAS satelites. When the GPS tries to find the sattelites, it can't lock on and goes into an error mode and locks up.To eliminate the problem disable the WAAS which can be done when starting the unit. Then go online and download the 3.70 firmware version and load it into your unit. This will correct the system to function with the newer WAAS system. After installing the 3.70 software then you can enable the WAAS function.
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Go to the Garmin support area for details.

http://www.garmin.com/garmin/cms/site/us/support/searchsupport

Search for: "How do I reset my gpsmap 76"

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