Direct Debit ACH/EFT Contribution: Asking for Banking Info Twice
Exactly - the broken image for the cheque display tells us that the template/js from the iATS Extension are not loading properly



First thing to do is to check your Resource Settings URL:
civicrm/admin/setting/url?reset=1
specifically the Extension Resource URL

Second thing to do is to start up a browser inspector tools - and check the console -> for javascript errors when you load the page;