OK, here's the thing. I have an old iMac G3, it's not great, but it still works for the net. I was thinking about setting up a small webserver on it, but here's the thing. The top 1/3 or so of the monitor looks like its folded over or something. Like the picture has been stretched but you can only see refresh lines over and over. It's hard to explain. Basically, the monitor is unusable. I have an old 14 inch monitor that will do 1024x768, but not at a refresh rate to match the built in monitor, so it doesn't show up when I'm using the vga out.
My question: Is there any way to a) fix the monitor (hoping its a loose connection or something), or b) disable the onboard monitor entirely so that you can use lower end monitors, or c) disable it anyway, because if I have to get a monitor to support it, I still want to disable the built in monitor in case any epileptic people come over, because the flashing is almost enough to give me a seizure.