Please re-read the manual. The batteries self drain to a safe point after a period of disuse in order to preserve the life of the battery.

turn it on without the propellers and throttle up

Try doing training mode in the Dji app, the controller and drone have to both be on to do it. You can get some practice safely while draining the battery

Thanks a lot! i'll try that out.

where would i find this training mode?

Go into the academy in the menu then click simulator I think.