I am sorry to hear that your moderately classic camera is not turning On.
Given its age, it is unfortunately quite possible that it has failed in some vital respect owing to that age.
But there are things that you may try, before deciding whether to send it to Canon Repair:
- Try cleaning the terminals in the battery compartment, after removing the batteries, first by rubbing off with a fresh pencil eraser, then by wiping the terminals off with cotton swabs moistened in rubbing alcohol, then letting them dry off for 5+ minutes with the battery compartment door open, then try turning the camera On again.
- After that, be sure the battery you are using is the correct one for this model, sufficient to power it On, by letting me know what type or types of battery you have tried in it so far, please.
(And after that, Canon Repair is here: 1-800-ok-canon, or perhaps this web page: