From your description I think what you have are what I call euro hinges .
It has a 35 mm hole partway thru the door with screw holes just above and
below . Pull the screws , slip a knife blade or very thin screwdriver
between the hinge and door and they should pop out . Might also be a
paint/varnish bond workin' here . Might help to loosen the vert adjustment
screws , if they're misadjusted they can put enough bind on the hinges to
make removal difficult . If the screw holes in your new door are 5mm <~1/4">
diameter , you'll need plastic inserts for them . Might be able to pop the
old ones out of the old door , might not .
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Snag
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