it won't turn on

my nogo f1 speaker(it's exactly like merit shok ultra outdoor Bluetooth speaker) dropped several time

after which it won't turn on. when charged a red light beside the socket is turned on and it stays that way till the battary is depleated.

I managed to open it up, I accidentally touched something and it turned on and I paired it to the mobile and it worked perfectly fine for a couple of hours but the power button didn't work at all to turn the device on or off.

after sometime from turning the mobile bluetooth off, the speaker turned off and won't turn on again

so I guess the problem is the power switch.

I tried to repeat the coincidence by touching the board haphazardly but of course it didn't work

any ideas plz or detailed videos for replacing the switch as I'm not professional with such things