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I have a 4 bulb light fixture which suddenly just went out. I checked and there was power to it. I changed all the bulbs in case one was bad and still nothing. So I purchased a new ballast and installed that. Nothing. There is power to the ballast and power in all the wiring going to the bulbs. So I have no idea what to check for next! Any ideas?

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    1. How are you determining that there is power? Use a load (e.g. incandescent lamp), not a meter. 2. Are you sure the ballast is wired correctly, with the correct sockets (shorting vs. non-shorting)? – DrMoishe Pippik May 10 at 0:52
  • Shoot us photos of how you wired the ballast. Bet the problem is there. Did you have any extra wires? – Harper May 10 at 5:08
  • Are the starters OK ? try to replace those. Are you using an electronic ballast or a good one? Is your neutral OK?. And also: where are you on Earth? – DDS May 10 at 9:08
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If the ballast is wired correctly make sure the connections to the bulbs aren't loose. You could replace a pair of connectors as a test if your fixture allows.

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