Sometimes, in spite of best intentions and efforts, something may go wrong with your room that cannot be resolved in a reasonable time. There are usually three options:
Continue in spite of any remaining issues (the ‘making do’ strategy)
Move the class to another room (where possible)
Abandon the session and re-arrange an alternative with timetabling (the ‘last’ option)
Note that the lecturer remains responsible for the teaching session, and ultimately makes any decision about how to proceed, based on input from the LSTS team where possible.