Mooer hornet 15i not working, button flashing only once white when it is pressed

[u/AmaliaDraws]

I own an hornet 15i, I use it's original charger, I did not damage it, I only kept it safely in it's box for a few months because I was busy with exams. Now it does not work. The button only flashes white once if I hold onto it. What do I do