Need more information. What exact model of y6B are we working with here since MTH made it in both Railking and Premeir, not to mention different electronics (PS1, PS2, PS3). example 30-xxxxx-x or 20-xxxx-x
Also, if you are talking a PW ZW, then you do not have a bell button that may or may not be needed in some reset sequences.
" it will not move and shuts down" this potentially sounds like you need to check the battery in that MTH engine as it is required for proper operation. The sounds should continue for several seconds after removing power.