map wrote in news:1178173228.763306.205790
@l77g2000hsb.googlegroups.com:

Any thoughts on where to start looking?


Anything magnetic anywhere near the compass sensor....INCLUDING any wires
anywhere near it with current flowing in them. Be sure to look BEHIND the
bulkhead it's attached to, also! That sneaky magnetism goes right through
a teak or plastic bulkhead...(c;

Remember that tool box you put in that locker full of magnetic tools?

Also, try unplugging and plugging in the cables several times to clean the
contacts. A TINY bit of WD40 helps a lot!

Larry
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