Recently, I had a conversation with Chris S, a vintage stuff collector who told me that he'd never had an HP LX because of the (in)famous problems with hinges. To calm his worries, I promised to come with a link to a great source of all-things-HPLX knowledge. Here it is: an article about how to repair broken hinges, latches, displays and keyboards, and how to prevent future hinge problems - at Hermocom.
MCbx (see comments to this post) has just sent me a link to his updated page about HP 200LX. Lots of useful tips, programs and links to resources over the Web. Here it is: