Need help about external monitor

Hi, I recently purchased a LCD monitor. And I use it as eMac's external monitor because I don't like the CRT monitor on the eMac. The problem is how can I turn off the monitor on the eMac and just use my external monitor as the main one???

Po-Nan Lin,
Welcome to the Apple Discussions!
There's no switch or software patch that will blank the eMac's CRT while leaving the video out active. Short of ripping open the eMac and cutting the CRT's video cable (which not only obviously voids the warrenty but carries a definite safety risk due to the CRT's charge), there's no way to do what you want.

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