I set the navman for home, but on the way back I went a different direction then usual, but the navman still plotted a course several mile away

Usually a bad wheel speed sensor. But when warning lights come on, there are always trouble codes stored in the computer. Get the codes read and then you'll know where to start your diagnosis.

If some of the lists are missing press the STAT button then select SetUpEditor and ENTER to restore all of them (without data, of course.)
If the statistical plots are turned OFF you can turn one of them back ON again. Press SHIFT Y1= to access STAT PLOTS. Press 4:Plots Off. A good habit to avoid problems. After you turn all plots OFF, you must turn one of them ON if you intend to draw statistical graphs. You can for example Turn Plot1 ON.

1. To do so Press SHIFT Y1=, select say 1:Plot 1 ENTER.
2. Highlight ON and press ENTER.
   
3. Press DownArrow to move to line TYPE
4. Then you can set the plot type. You have 6 choices. Use the left/Right arrows to select one of the 6. The selected plot type icon will remain highlighted when cursor is moved.
5. Use DownArrow to move to XLIST line and select the x-values LIST. etc.
6. When finished Press 2nd QUIT to exit the stat plts configuration settings.

One statistical value that may be of interest to you is the R, R^2 coefficients. To have it displayed (if the regression model has it), you must set DiagnosticsON.

Press SHIFT 0 to enter catalog. Press x^-1 key to jump to the first command that starts with D.
Scroll down to reach DiagnosticsON, highlight it and press ENTER then ENTER.

Running so few miles has accelerated the aging of the battery - the battery never had a chance to fully recharge in such small trips -  so now you have to replace it a year sooner than usual.
Just replace it.

You should do the following: Changing the Navigation Settings;
Touch Tools>settings>Navigation. There you'll find how the sysytem will calculate your route.Route Preference.........Faster Time....Shorter Distance.......Off Road....Avoidances,very helpfull....Restore original navigation settings.
Hope this will help you,
JADF

I had a similar problem, do a compression check you may have a valve problem.

does it include the map for North America and Canada?
you may have to reload it
try using shortest route

needs map updates,when was unit updated last?

Surely this is covered by warranty. Has anyone contacted Navman to find out about repair/replacement?

i was in car,using navmanf10, went blank and a comput screen connect to unit appeared, cannot do anything with it

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