I've checked all the relays, fuses, and connections with the A/C system. The compressor still won't turn on. Is there anything else I can check or miss with before I know I have to replace it, could it possibly be a different problem than the A/C compressor. What is the procedure for it being replaced? I looked around and saw that have to have someone Vacum the system and recharge it. Is there anything else I have to do?