According to Scott Townsend :
I have a 3/4" Conduit that seems to be blocked at the end. We can kind of
hear the Fish tape tink at then stopping point, though we don't know where
it is... We don't know how to locate the end of the conduit. We were
thinking if we could see the end, it might help us determine the location.
It is about 6'-8' to the end of the conduit. I've tried looking for Small
Cameras, but nothing that will really fit in the Conduit. Found a bunch of
Borescopes, though they are too expensive.

Aside from the suggestions of measuring how much fish tape goes
in the pipe, are you _sure_ it's actually blocked, and not just the
end of the fish tape running into an elbow or something?

Old trick: tie a piece of string to a ball of cotton batting, and
blow it thru.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.