Not that long ago, thanks to the kindness of a friend, I became the owner of a perfectly fine, but well used audio receiver. One problem: there was no remote and no manual. Actually this turned out to be no problem at all, I could turn to a helpful online resource for old and outdated devices...a library of missing manuals. Whether it's for the uncommon Tiantianyong TV-139f for Dynex TVs or the instructions for a discount bin manual remote special, Remote Central's Universal Remote Control Manual Archive has a large database of downloadable instructions available for free. Both Universal Remote Control Manuals and OEM Remote Control Manuals are listed, with a search by name option if you know the name/model you're looking for.
If you don't find it there, you might want to swing on over to SafeManuals/Diplodocs, a database of more than 1.2 million manuals available for download for domestic appliances, TV's, audio equipment, phones, computers, and just about anything else that came with a printed instruction manual.
(Image: Gregory Han)