Unplug Internal iMac Screen?

[AmazingHenry]

So I have an iMac, late 2006, with an 1.83GHz Core 2 Duo. It has a 17 inch screen, but that screen has been going crazy lately. It's completely unusable. So I've attached an Apple Cinema Display (the older model, with no camera), which I use as the main one. The problem is, whenever I boot from a CD, or go into Open Firmware, it shows up on my iMac's 17 inch screen, so I can barley see anything. I've taken apart this iMac before, and I know where the screen is attached. Could I just unplug the internal screen? If I did, would the external one be used as the main one, just like a Power Mac or Mac Pro? Would the iMac even boot? Thanks for any help.

 

[danielwsmithee]

More than likely yes that is exactly what would happen. If your going through the trouble of taking it apart can you find a used screen on eBay to throw in it instead?

 

[AmazingHenry]

More than likely yes that is exactly what would happen. If your going through the trouble of taking it apart can you find a used screen on eBay to throw in it instead?

I don't think I'll be getting a used screen, I don't really use this iMac much anyway, and I like my bigger, nicer external display. I'll be detaching that screen now. Thanks!
[doublepost=1475281175][/doublepost]I've gotten partial success. The iMac is running Snow Leopard, so it boots up to the Apple, and then the screen goes blue. I waited 5 minutes, and then restarted the iMac while holding down Command+Option+P+R. This time I got to the Snow Leopard default desktop picture (which is also my account desktop picture) and then it stops there. I'm going to try re-installing Snow Leopard and see what that does.