Question about Garmin GPS 72 GPS Receiver

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Screen Blanks Garmin GPS 72After 30 minutes using a 12v adapter The screen blanks. A single vertical black line remains. It will not restart until the batteries are re-installed.Garmin sent me a new 12V adapter. It did not fix the problem.

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  • SailerMan Feb 11, 2008

    My unit worked perfectly for at least six months with WAAS enabled. Suddenly it started blanking the screen and showing a thin vertical black line approximately three minutes after initial power on or removing and replacing the batteries. Until the time the screen goes blank the unit works okay. Have not tried with WAAS disabled.

  • rak2426 May 12, 2008

    Screen blanks and has the line. I turned waas off and the unit works properly. Garmin still has not released a fix so it's not as accurate.

  • jmiano Apr 28, 2009

    i have the same problem.Screen goes blank(one vertical line) after a few minutes, but only sometimes. Must remove batteries to restart. I'm checking out this WAAS you guys are talking about.



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New software is out 2.50 will fix problem with waas.

Posted on May 27, 2008

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Contacted Garmin Tech Support and they verified the problem with the WAAS. They said the engineers were looking at the problem. Estimated the fix would be ready in 2 to 3 months. I turned the unit on inside where the unit could not receive any satellites then disabled the WAAS and the unit works without problems. It is just not as accurate.

Posted on Feb 12, 2008


The freeze and the line (blueish in my case) is, per Garmin, caused by the incompatibillity of the WAAS software with the signal generated by the satellites. Sounds like the DOD made some changes and Garmin has not patched THEIR software to work with the new situation.

Posted on Apr 30, 2008

I emailed Garmin. There is a problem with the software when using WAAS. Until they release a software update, you need to disable WAAS.

Posted on Nov 19, 2007

Same thing. Page blanks after a few minutes of use, single vertical black line. Have to re-install batteries to reset. Several times this happened, I was using the zoom feature. Now I try not to zoom.

Posted on Oct 22, 2007

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Had to wait 24 hours to be able to post my own answer
By reading a number of forums, I've found that there was a WAAS satelitte update (bug), that causes this foul up.
The only solution I've been able to arrive at is DISABLE the WAAS feature, as no Garmin Update/patch (for Rino120) has been made available.
To shutoff the WAAS feature press your [Page] button until you arrive at the "Main Menu"
go down until your on the "Setup"(hammer)
go in (by pressing in, on the directional button)
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go down until your on WAAS, go in and select the Disabled
go up to the "X" (top right) press it, then you can [Page] button anywhere you want from there.

Wonder what WAAS is?

Take care.

PS- Garmin if you read this....I would like to have my WAAS back, and since I registered for updates, back in 2005, why didn't I get an email from you telling me about this issue (when it happened and provide a solution - at the same time :: even a work around as I've posted here)

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Possible Solution found on google....

My old Garmin 162 chartplotter was mounted on the binnacle guard and served me
well for many years. Lately, it started getting very slow to refresh screens.
At times, it would shut down with only a black vertical line on the screen. On
our last cruise, the screen froze at a very critical moment. Too old to
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I read an article in the GoodOldBoat newsletter about the Department of Defense
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Call Garmin tech support with any questions or to find out about the software patch, 1-800-800-1020

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