The image projected from my CTX EzPro 680 Projector flickers on screen

They (Apple) might be right. It could be that the projector is damaged, like the bulb, or it could be incompatible with your computer, but I don't think that is the case. Try taking the projector to a computer repair place.

You have function key (FN) that you need to hold down while pressing the icon screen key or CRT key depending on the model of your laptop at the same time. If you toggle this 3 times each provides a no image to the projector or an image to the laptop screen or projector and laptop image.

Had the same problem, tried a Factory Reset from the menu and it seems to have worked. Don't know what caused in in the first place

sir
the lamp is not at problem, but the dlp engine is at fault, u may have to replace it.since u bought it 2nd hand,it is not worth changing the same as it will cost u more than ur buying price.when u plan to buy ur next projector, make sure u buy a new one as it will come with a fresh lamp & manufaturers warranty on the unit & at 4000 / 5000 hours of projector usage is guaranteed!

Make sure that your computer was turned on first (don't ask me why). Then hold down the Fn key while pressing F8. Hope that helps.

Try changing the refresh rate on your graphics drivers to 60 or 70 hz on both your laptop screen and the projector. Do this at the desired resolutions as well.

this is due to improper power supply or a loose connection inside. the symptoms are of power supply unit inside projector. check out the current and amperes inside the projector on board. sometime the current stable but the ampears are down.also check the switching transistors & filters inside.......

This is the problem I had with a couple of my projectors, one of them I just replaced the bulb and the other needed whole new brains (controller board)

I'm going to guess that you have a wide screen Dell laptop with a 16:10 aspect ratio and a default resolution of 1280X800. The wide screen is great BUT most presentation grade projectors do not have a native (pixel for pixel) 16:10 mode. Instead they still prefer a display input with a 4:3 aspect ratio like your old square CRT or standard definition TV. Why do they prefer a 4:3 input? Mainly because Powerpoint prefers to display a slideshow in a 4:3 mode. Because of this Dell, in their infinite wisdom, created the 'presentation mode' utility in an attempt to automatically convert the VGA output of your laptop from 16:10 to 4:3 on the fly. In my experience this is an annoyance at best and at worst can seriously impact the size and quality of the projected image.

The best thing you can do when you connect to a projector is ignore the presentation mode alert and manually set your laptop's resolution to 1024X768 for an XGA rated projector or 800X600 for an SVGA rated projector. This will cause your desktop to look stretched on your laptop but will give you by far the best projection image.

John here, customer advocate at Dell headquarters. If you can nvigate to the On Screen Display Menu, you should see an "all images" section on the main menu. There you will find brightness, contrast, color temp, white intensity, and gamma controls. You should be able to make adjustments from that menu to sharpen and brighten the image.