Welcome to 2CarPros.
A clicking sound usually indicates a weak battery. Although you had a jumper pack on it, there may still not have been enough power. Lets start simple. I want you to load test the battery. Here is a link that shows how to do it at home. Try this and let me know the results.
https://www.2carpros.com/articles/car-battery-load-test
Now, if you hear one click and everything dies, make sure the battery terminals are clean and tight. Take a look at this link.
https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked
Start with these two things and let me know what you find. Also, describe the clicking you hear. Is it one click or many? Can you tell approximately where the sound comes from?
Take care,
Joe
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Tuesday, June 29th, 2021 AT 9:12 AM