Time to break out the screwdrivers and see what it looks like inside! Let us know what you find in there.... Watch the static while working inside the cam - touch a grouded object periodically.
There are two ways to handle the digital. One is by turning on the camera before taking the picture with Brians chip like the S200. The other is to let the camers set on like the D-370
There are a couple things you can look for before you start. Is the power switch integrated into something else like a lens slide such as the D-370 and th D-380. If so it may make it tough to wire. You can test and see how long it will run on a set of batteries and if you can disable the auto-shutdown.