Can closed lid mode damage new MacBook display?

I would like to buy one of these new 24" LED Cinema Displays to use it with my new (late 2008) MacBook. Actually I would love to mount the display on my wall in order to use it at a TV with the MacBook (if longer cables are available).
Apple advertises to use the new MacBook in closed lid mode with the build in iSight. Now I heard at my local dealer, that the MacBooks heating can seriously damage the internal display when the lid is closed.
I allways thought that these two devicews are made for eachother. Do I risk to damage my MacBook when using as a video or TV source for several hours? Do I loose warranty?

Thank you Malcom. I read these articles. They describe how you enter the clamshell (or closed display) mode. But I still feel that they don´t not really cover my question: Can extensive use of the Macbook in clamshell mode damage the internal display (for example while watching movies on the connected 24" LED Cinema Display)?
It is just because this guy at the Apple dealer over here (GRAVIS) said something like: "oh - this is the worst thing you could do to your MacBook ..." and: "everybody is saying that ..." and so on.
Has Apple taken specific care of ventilation in clamshell mode on the new unibody MacBooks? Does the heat then flow out of the rear of the machine or is the MacBooks glass display somehow less sensitive for heat?
Thanks again.
Message was edited by: titusm

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*My situation:*
My 17" MacBook Pro is connected to an external 24" display using DVI to DVI.
What I want to do: I want to be able to close the MacBook Pro lid to put the computer to sleep (along with the external display). I should be able to click a mouse button or keyboard key that is connected via USB to wake the computer up but only show video on the external display; the MacBook Pro's built-in display should not be activated. (This information can be found here: http://docs.info.apple.com/article.html?artnum=86286).
What I used to be able to do: exactly this, using my old 13.3" MacBook.
What the problem is: the computer and display successfully go to sleep, but upon pressing a button on the mouse the MacBook Pro is fully activated including its internal display, as well as the external display.
What I have tried: multiple USB keyboards/mice and the undocumented method of simply inserting or removing a USB device to wake the system. I have also tried with an Apple Remote and tried to invoke sleep within the Apple menu instead of closing the lid; every time the computer wakes completely.
The power is connected.
Any ideas guys?
Edward

I'm still puzzled at why it the screen is activated when the lid is closed and woken with an external USB device
That's rather puzzling as the display should not work if the lid is closed. If you have an external drive you're able to install a clean copy of Mac OS X to and boot from you can see if the issue persist there. If it does then it's most likely a hardware issue and you should contact AppleCare. If it doesn't then it has something to do with either your software installation else some utility you've installed.

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Is running in closed-lid mode on the MacBook using a television with the Apple Video Adapter supported? I can't get it to work properly.
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Make sure your power saving settings aren't unusual - I find normal works fine. Configure your external displays with the lid open and then with the power cable connected try closing the lid. It will fall asleep immediately - let it. Then when the light throbs try waking it back up again with the remote... It works for me, but it did try my patience before I came up with a routine that I was happy with.
Also - how do you connect your TV? My TV has a monitor / DVI out and it's quite happy with that. I shouldn't think that S-Video should be too different. Has anyone tried with S-Video? Hope this helps...
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MacBook Pro keeps going to sleep in closed-lid mode and external monitor

I am trying to run the MacBook in closed lid mode with an external monitor. It seems to work fine at first, but after about 10 seconds, it goes to sleep. I can wake it back up but it just goes to sleep again.
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I figured it out. Apparently you can't run in closed-lid mode on battery. I plugged in the power adapter and it's working fine now.

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Hi
I managed to hook up the DVI to VGA adapter and view on my Sanyo TV. Nothing fancy just a older TV.
I am feeding through the Yellow Video output into the video input on the TV. (Also tried s-video)
Viewing with the macbook lid open no problems. Remembered that I could close the lid.
Followed the instructions online about connecting, closing the lid and waking up using my bluetooth mouse.
First time things went well - able to use Front Row and View Slideshows etc. also steaming video from Safari, (TV Land for my kid)
Then the screen began to flash - and change to black with rolling images.
Like you used to have in the 60-70's black and white TV - multiple images rolling past over and over.
I tried rebooting - starting new connections, using different cables, using both VGA and S-Video directly into the TV and not through my reciever.
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I can't use closed lid mode at all. I must instead, dim my screen.
Help?
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Thanks, BSteely, I have the latest QT and iTunes already. Closing the lid seems to kick the MacBook external display into some special mode that Front Row can't display videos in. For example, you get the Front Row interface, but as you select movies/TV shows, the preview window on the left side is blank. Open the cover, and have both displays going, and you can see the previews fine (and of course, you can see the movies/TV shows play fine as well when you click on them)
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Turning off closed lid mode

I was wondering if there was a way to turn off the closed lid mode feature. It's the feature that allows you to use your MacBook even when the display is closed by hooking it up to an external monitor, keyboard and mouse. The problem I'm having is that when I close my MacBook to go into sleep mode, I leave my wireless mouse dongle plugged in, when my mouse gets a slight bump the computer awakes from sleep mode and goes into closed lid mode, it's really really annoying. Help please!

This is what you want.
http://www.versiontracker.com/dyn/moreinfo/macosx/30315
Dave M.
MacOSG Founder/Ambassador  An Apple User Group  iTunes: MacOSG Podcast
Macsimum News Associate Editor  Creator of 'Mac611 - Mobile Mac Support'

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I just recently connected my MacBook Pro to my Samsung DLP HDTV and started running it in closed-lid mode so my TV is the primary/only display. I also have an external hard drive (USB), external mouse (wireless with USB toggle) and the new Apple bluetooth keyboard.
The problem I have isn't entering the closed-lid mode. But once in closed-lid mode (after a short period of time) all of my USB devices disconnect and then reconnect. I know this because I get an error saying that my hard drive was removed improperly (please eject before disconnecting, etc) and I also get a message from my mouse software saying that my mouse has been disconnected. But then they reconnect themselves (hard drive shows up again on desktop and mouse software informs me that the mouse is present again).
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I have an 15" MBP 2.53 running Snow Leopard, which installed fine. When I go to use it with my Apple 24" Display and my external hard drive, the external HDD disappears when I go into closed lid mode.
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and please ... STOP SHOUTING!
It doesn't make your message any more relevant or increase the motivation to help you. To be honest, it makes you look like a moron, if anything.
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Hi @VVel ,
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Can closed lid mode damage new MacBook display?

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