Graphics output issue while installing Mac OS 9 on old Power Macintosh G3

I'm trying to resurrect an Apple Power Macintosh G3 300 (Blue & White). I get the "question folder" icon when I turn it on normally. I burned an iso of Mac OS 9.2.2 and popped it into the optical drive. Screens I see: * "question folder" * blank screen w/ mouse pointer * happy mac icon * "Mac OS 9.2 Welcome to Mac OS" * "Mac OS 9.2 Starting up" + waiting mouse cursor + loading bar w/ puzzle-piece icons on the bottom * screen goes dead, monitor reports "OUT OF RANGE" I'm speculating that the mac is outputting an unusual resolution that my run-of-the-mill 1080 monitor can't make sense of over VGA. **What should I do so I can finish installing w/out flying blind?** Options I'm considering: * finding another VGA monitor * googling video of classic mac os install and copying key sequence * burning a different iso