Beachycove's screen transplant suggestion is a wonderful idea. There are (or used to be) stacks of 5300s with bad logic boards but good screens, so finding a source of organ donors shouldn't be too bad.

Once you've done the transplant, you've actually got a machine capable of playing movies (in Cinepak). A discussion on another thread got me interested in trying this out, and being able to play Galaxy Quest and Star Wars IV on a 68k PB is definitely a surprise and a pleasure.