After several months of on and off restoration work, my iMac G3 Indigo (350MHz) is now fully functional. I rescued the iMac from eBay, and it was in poor-to-fair condition. Like most of these G3's, I had to swap out several parts due to age and failure. The inner bezel was replaced with the clear MacEffects one which is somewhat frosted (for a nice touch!). The speakers were rotted out. I rebuilt them with parts from AliExpress. The headphone jack was corroded, but I was able to fix that with a thin metal file. I also replaced the 10GB hard drive with a 128GB SATA SSD (with a StarTech adapter).
Thanks to everyone who has posted their fixes, and a special shoutout to u/Aphelion270 for the awesome inner bezel replacement video. I am setting up space in my office to display vintage computers - several of them are Apple. I hope to post more of them here soon. For now, it's time to pull out some of the old game discs.