I was able to open a 315 by starting at the bottom with a screw-driver placed in the gap between either of the two cross ridges and twisting the screw-driver.This opened a gap at the bottom which I followed around the perimeter with the screw-driver until both halves seperated fairly easily.
The only method I have found is with a dremmel tool and cut it open along the original split line.
All the electronics are clear of the case mid line. The case is a bit less than 3mm thick.
The antenna is closest with maybe a 2 mm clearance all round and the various (6) rear conector wires (on the right looking from the back) have a similar clearance but sit below and away when the unit is assembled. Cheers
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there are 4 screws hidden under the little black rubber plugs on the
back of the unit...remove those 4 screws, then slip something small and
flat (i use my finger nail) around the area where the back and front of
the case meet...there are several snaps that hold it together that youll
have to break loose to seperate the back and front....slowly seprate
then and disconnect the screen ribbon from the main board... the screen is only held in by little clips on the sides...just gently
pull the case away from the screen in those areas and the screen will
there are 4 screws hidden under the little black rubber plugs on the back of the unit...remove those 4 screws, then slip something small and flat (i use my finger nail) around the area where the back and front of the case meet...there are several snaps that hold it together that youll have to break loose to seperate the back and front....slowly seprate then and disconnect the screen ribbon from the main board...
There may be a few reasons for it not locking on '1) batteries too low 2) Sirf chip damaged 3) Not in an area where it has a clear view of the open sky 4) electricasl interference from other electronic products 5) High voltage power lines overhead Manual here https://www.magellangps.com/assets/manuals/gps_310_315_en.pdf
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I just got my GPS 315 open, thought it may have zebra connectors. You will break the wires from the data connector in opening this beast. There is a photo on this site showing the wiring. It is a wired panel the connections to the LCD uses some super adhesive that gives way after a time. It appears unrepairable. I have two early 7 inch LCD TVs with the same problem. There is NO markings as to part number or manufacture so the panel will be unavailable. So I would suggest to use it as is or use it with an early laptop with a serial com port. Gary G
I have one of these units and it too is experiencing the same problem. I have talked to one geocacher and he thinks it could be the connection to the antennae that is now broken. He has a different Magellan unit and he had to fix the antennae connection. I was going to try that on my unit, but I need to figure out how to open it. Hopefully this helps. If I find out more I will let you know.
I own Two Magellan 315. They both have failed in exactly the same way as yours, will not lock on too a satillite. I have concluded that this is their design life and that is the end. I did post one to the Magillan repair centre in France but that disappeared. I have replaced the two of them from EBay and will see how I get on with those