u/LAND3KS

I have a gopro hero 10, the problem is really basic, it doesnt turn on, or atleast, sometimes.

When it is off, if i put the battery or the cable a red led turns on, and the gopro doesnt do anything. Sometimes the small screen's backlight turns on but it stays put. Then, after some time the red led turns off and the gopro turns on normally

I have a cube two15 2017, and since i bought it i changed rotors and pads, but the brake keeps hissing, it isnt because they're new (i think) since my rear brakes (same setup as front) didnt give me any problem, it isnt oil because i checked both pads and disc and now i dont know what to do, brought it to a shop but they didnt solve the problem.

What can i do?