i have a 1000w agro star hps wired for 120v that isn't lighting. i've replaced the bulb, and ignitor, and it still won't fire up. the cap looks fine, it's not blown. the transformer looks a little crisp, but it hums. i've checked all the wires from the plug to the socket and it all has power. i know the bulb isn't bad, they've been checked. anyone have any ideas on what's wrong?