when I go to device manager, it shows multimedia controller, network controller and video controller missing with yellow marks but i can't get sound, can't connect internet via wireless and when button for wireless i see no light . all these happened after re installing windows 7
Obviously after you wiped out the OS all drivers are gone... you should start downloading it from the HP support pages.
Things doesn't configure themselves yet... thus your Wifi card needs a configuration to start working within your local network right? ... like choosing network from the list and putting the password for example.