Hi DJ
Can you give "show switch" on the second switch and see the stack number on it ?
try the command " switch member-number renumber new-member-no"
specify the current stack number (which i presume is 2), and then the new stack number (which is 1 ?)
then do a reset to the stack member (reload) and see if it comes back..
verify by giving a show switch again..
Hope this helps.. all the best..
Raj