I just tried playing my Turbo Express for the first time in several years the other day and couldn't get it working. I would just get a solid yellow screen with no sound or anything else.
I was using rechargeable batteries to power it. I'm not positive, but I thought I remember reading something a long time ago about the Turbo Express not being able to run on rechargeables. Is that the case or is it most likely broken? I just cleaned the contacts too, so I don't think that has anything to do with it.
Also, I have a loose TG-16 power supply laying around. Is that compatible with the Express or does it require a different one?