I have a light fixture that hangs from the ceiling which no longer works with new bulbs. It uses Dulux D/E 18 watt compact fluorescent bulbs. I'm ok with it not working but when I turn on the light switch, it emits this high-pitch sound – even with no bulb. A simple solution to the sound is to just not use the switch but I need to use it power on other things. Can someone tell me what the issue is and how I can resolve it?
Here are some images of the light fixture itself and inside of it:
Any information would be greatly appreciated.