Okay, so my Doctor Who works great just after I've started it, but if I leave it to sit for a while (not long, 1 hour?) it starts to act weird. It makes the "clicking" sound like when it's searching for a ball. And I shot a ball into the left hole of the Time Expander and it ejected right out, even though it should have stayed there.
Still no credit dot though. Any ideas what could cause this?