Bob Miller wrote:
Even if the CW filter is missing, he should be receiving CW through
the standard SSB filter.

Unless the filter was removed incorrectly by a previous owner. For example my
TS50 requires that a jumper board be put in place of the CW filter board if it
is removed. If the IC745 has such a jumper board, and it was not replaced after
a filter removal, then the CW mode might very well appear dead. Just a guess of
course.

Just switch to the "CW" mode, and make sure "CW narrow" isn't switched
in. At least, that's the way my Icom 735 works. The 745 shouldn't be any
different.

Or maybe it really is operator error as you suggest. Lets hope so...