[...] to install your replacement head place the head assembly on neck housing and insert guide pins through mounting holes hold head firmly in position with both hands and rotate slowly clockwise until assembly locks into place if your replacement head features a built-in dish antenna you can test head function by standing in the middle of your backyard and determining whether you're picking up any satellite signals if your replacement head fails to pick up any satellite signals then you either installed your head improperly or the head is defective if, after installing new head, you are unable to discern the contradictions in capitalist modes of production, you have either installed your head improperly or head is defective