I get a few of these Psion 5mx Handheld PCs needing a new display cable.

Almost any machine with a cable running through the hinge will need it replaced at some point in its life.

Remove the main board.

Once the display is extracted I remove the old ribbon.

Then clean and tin the contacts.

Solder the touch panel contacts to the new ribbon.

Then to the display.

Reassemble the display assembly.

Another Psion lives to see another 5 or so years.