LCD screen isn't displaying?

If your LCD screen isn't working, there's either an issue with the screen itself, an issue with the connection of the LCD to the motherboard, or a battery issue. If the battery is at fault, a new battery will be needed. To know if this is the case, try charging the camera then turning it on. If the LCD is still not working the issue might be somewhere else. If the LCD has a bad connection to the motherboard, you'll have to tear down the camera and reconnect the screen to the motherboard. If neither of these solves your issue, a new screen will be needed. There are guides on this website that'll explain how to replace batteries, screens, and check connections to the motherboard.