The A2000 doesn't need (and can't even use) a kickstart disk. Kickstart is in ROM.
As most people here told you, you should get a white screen with a disk logo (kickstart 1.x) or a purple screen with an animated disk going in a drive (kickstart 2.0 and higher).
What have you connected the machine to? Try locating the video out connector (next to the L/R audio) and hook it up to your TV (composite in). If you get a (black/white) screen it means the 2000 is at least functioning.
