New MacBook connected to external VGA display screen flash.

Just got the 2.4Ghz yesterday. For home use I've got it connected to a Samsung SyncMaster 2032NW display via the Mini DisplayPort to VGA Adapter. Occasionally the display will go dark for a half-a-second or so and then come back on. It happens randomly, not for hours sometimes and sometimes multiple times over a shorter period of time. There does not seem to be any repeatable action that causes it to happen, it appears to be completely random. This does not happen when I'm using the built-in screen. And I didn't have any problems using the Samsung display with my older MacBook.
Should I take the computer back? Is there something I can do to check the hardware for issues?

Glad that I am not the only one have this problem
Got the latest macbook aluminum yesterday and hook up to my Dell 24" monitor (2407WFP-HC, 1920x1200 resolution) through mini-displayport to VGA adapter. I also kept macbook lid closed and plugged in the USB keyboard/mouse; so that I can use the external monitor as the only screen. The monitor randomly goes black with a message saying "Entering power save" and then after a second comes back fine.
I am not sure but I feel it happens more when I open new windows, although there are times it happens while I was doing nothing than reading a web page. There is no problem with using the built-in display without external monitor.
Any help would be appreciated!
Message was edited by: duancg

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The problem is that it is not a consistent issue. Sometimes it works, sometimes it doesn't.
I set up the external monitor as the main one (when it is connected), but since the very beginning I did this, I had problems setting the screen resolution. Sometimes it recognised the optimal resolution and used it, but sometimes it did not, it used something like 1024x768 and I can't set the appropriate resolution in the Preferences Panel since it is not available.
Some of the latest times I tried to connect the display I tried to wake up my Mac with the lid closed (using a usb keyboard to wake it up) to force it to try and connect to the display. But now even this "trick" does not do anything (the Mac just wakes up and lightens its own display, even if the lid is closed).
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I also have another Mini DisplayPort to HDMI that I use to connect to other peripherals, and it works fine..
Also, the monitor works fine on another PC.
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Whay would you suggest?

Hi,
HDMI to VGA cable won't work, you need a converter to convert from digital to analog. The following device is one example:
http://www.jaycar.com.au/productView.asp?ID=AC1638
Regards.
BH
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Hi,
HDMI to VGA cable won't work, you need a converter to convert from digital to analog. The following device is one example:
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Regards.
BH
**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

New MacBook connected to external VGA display screen flash.

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