@TimmyProgamsStuff probably need to be in download mode - the green light needs to be flashing.
Press left side button for 2 seconds then plug into usb cable attached to the computer - green light should be flashing.
If it was flashed (at least on computer it says it was), disconnect the sticks3 from the computer. If green light is flashing press left button for 6 seconds then press once quickly again - green light should come on then LCD should turn on properly