Saber not turning on/ Need help with diagnosing issue

[z.will]

Hey guys, i recently pulled out an old stunt saber on mine from a few years ago, when trying to turn it on (after putting new batteries inside) the button made a little popping sound, and wont turn the LED on. Not really sure how to go about fixing this, any advice would be appreciated.

heres a link to a video of the sound its producing. https://drive.google.com/file/d/1XGEK1m8o3OQhDIUu9NKrhUvmR4sVKgK3/view?usp=sharing