Editing Psion Series 3 Hinge Repair (section)

== The four hinges ==

Two '''visible''' hinges just beyond either end of the button bar, with a metal rod down the centre; two '''hidden''' plastic nipples between the battery compartment and the button bar.<ref name="mackay">David MacKay, [http://www.inference.org.uk/mackay/psion/psion9.html "Psion 3a Hinge breakages"]. Source for the hinge locations, both failure modes, the over-opening cause and the epoxy repair.</ref>

* '''Visible hinge:''' the 8 mm-wide neck joining the hinge to the lid shears off, about 2 mm above the hinge. Caused by '''over-opening the lid'''.<ref name="mackay" />
* '''Hidden hinge:''' the plastic nipple breaks off. The back edge then looks crooked while opening and the button bar flexes out.<ref name="mackay" />

Both are repairable with '''epoxy''', optionally with a thin steel strip bridging the visible-hinge neck.<ref name="mackay" />