Most children will fall asleep in a dark room when it’s quiet. Sometimes a very small child will need to be held or rocked in order to fall asleep, but there’s usually some way to settle the baby.
assitant
Did you try offering the baby a toy?  That usually helps settle them.  Or have you tried breastfeeding?
assistant
How do I put a baby to sleep who is agitated but just won't fall asleep?
user