Does anyone know how to fix a ThinLite tablet (aka portable light table)?

My artist mother commissioned a friend to make her a couple of portable lap desks about ten years ago. They were made by incorporating a ThinLite Porta-Trace into a thin, laminate wood, lap desk. Her friend also changed the plug to an in-line switch for convenience. These have worked great until a few months ago when they simply stopped turning on. They both quit working with in weeks of one another.

I suspect that the in-line switches are busted (having seen ten years of heavy use) but I have no idea how to test this theory. The inner workings of the light table are so alien to me I don't know where to begin.

Can anyone offer any guidance?

Picture of Does anyone know how to fix a ThinLite tablet (aka portable light table)?
lemonie7 years ago

3rd picture: you've got exposed power-in, that could be tested with the correct tool. I can't see if that fuse is intact but it probably will be.


SeaSkyShore (author)  lemonie7 years ago
Sorry about the low res, my mother took these with her cell. The fuse is intact so I will try testing with a voltmeter.

I hope that the issue is with the cord, I really don't know what to to do if it isn't :(

Try that first, it's easy enough.

As L. says, I'd test there first, you need a voltmeter.

Be VERY careful at the other end of the PCB- there will be quite a high voltage there.