【Junk Item】LED Lantern LUMENA7

I dropped it on the ground while camping, and since then the button has become inoperable.
It's been sitting unused because I don't know how to repair it, but someone knowledgeable about electronics might be able to fix it.

I don't know what the inside looks like, so I'm not sure if it's repairable.
The parts and box are mostly included (though perhaps not everything).
Please refrain from returns or complaints after arrival.
Please consider this as a defective item.

[Product Description]
[Brand Name]: KM Corporation [Product Name]: Rechargeable LED Lantern LUMENA7 / LUMENA7GRN [Color]: Camouflage Khaki [Accessories]: Dedicated pouch, micro 5-pin cable, 2 hanger rings, 2 carabiners, drip-proof cap [Rank]: New N Rank / Although the plastic has tears and stickiness, and a price sticker is attached, it is a new, unused item. Please understand that the price tag cannot be removed. [Comment]: Lightweight and compact enough to carry in one hand. Don't miss this opportunity! *For details, please contact the manufacturer directly. ■Notes■ ◎The photos shown were taken with a digital camera. The actual product may appear slightly different in color depending on your viewing environment. ◎The size is an approximate value calculated by actual measurement. Please note that there may be some errors compared to the actual product. ■Payment Information■ For card payments, please ensure that the shipping address is the same as the card registration address. Cannot be shipped to Hokkaido, Okinawa, or remote islands. 

[Home Appliances][JAN: 4589901332374]
[Brand Name]: KM Corporation
[Product Name]: Rechargeable LED Lantern LUMENA7 / LUMENA7GRN
[Color]: Camouflage Khaki
[Accessories]: Dedicated pouch, micro 5-pin cable, 2 hanger rings, 2 carabiners, drip-proof cap
[Rank]: New N Rank / Although the plastic has tears and stickiness, and a price sticker is attached, it is a new, unused item. Please understand that the price tag cannot be removed.
[Comment]: It can switch between three LED light colors: daylight, natural white, and warm white. The brightness can also be adjusted in 4 levels. Lightweight and compact enough to carry in one hand. Don't miss this opportunity!