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awake with lid closed
Authored by: ahbe on Jan 28, '04 02:17:30PM
Ok, fair enough. Supposedly this guy from Apple said you can't run your PB with the lid closed. Then explain this article (Apple Support) to me please? I use my 12" PB all the time with the lid closed connected to an external monitor. In fact one of the grips about the 12" was a lack of ADC connector, which the new one's have. Now why would you need that I wonder? It's not often your going to find a projector with a ADC connection on it. No, it's to use your PB, lid closed, connected to a nice Apple Display. Now I'm not saying your lying, It's just that I wish Apple would get on the same page. Either say once and for all, yes or no to running your PB with the lid closed. And if we can run it with the lid closed, than why not let us set it up so it will say on when we close the lid? One other thing. I never used to run it with the lid closed until this recent OS update. Since than I notice the fan runs allot more and my little PB stays allot cooler. Before I was a little worried about the LCD, but not anymore.

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awake with lid closed
Authored by: drock3800 on Jan 28, '04 07:51:43PM

All I can confirm is that this WAS brought up to the Product Manager at the meeting and she flatly shot us all down by bringing up the cooling issue. Basically, Apple is not ready to support a feature that could potentially damage the unit. According to her (the Product Manager), the computer vents almost all of its heat through the keyboard. Prolonged running with the keyboard pressed against the screen (i.e. when the screen is closed) could both, cause the unit to overheat (due to lack of ventilation), and the screen itself to warp due to prolonged exposure to processor heat. Obviously it may be possible to run it this way, but I wouldn't expect AppleCare to cover a warrantied repair on a warped display that happened as a product of running with the screen down. Obviously it may work well for a while, but I can't blame apple for not wanting to cover ALL the potential problems that can arrise from such a setup.



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awake with lid closed
Authored by: ecammit on Jul 24, '04 10:33:25PM

How about this? Close your powerbook and either turn it upside down, or stand it up on end like a book. Since heat rises, if you change the orientation of your powerbook so that the heat rises away from your screen, should that not prevent the screen from burning up?



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awake with lid closed
Authored by: chrismo on Jan 23, '06 09:29:40PM

There must be some way to modify the firmware so that when the lid is closed the energy saving preferences are altered, reducing cpu speed and turning off the display, instead of full blown sleep. I also believe it is possible to modify the fan setting from a file in OS 10.3 to choose at what temperature and at what speed the fans are activated. Making the fans spin up at a lower temperature could help keep it cool with the lid shut. I intend to experiment with this more next time I get my hands on an iBook/PowerBook.



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awake with lid closed
Authored by: johnsawyercjs on Dec 26, '08 09:49:20PM

Speaking as a Mac repair tech since before the first Powerbook: yes, lots of heat is dissipated through the keyboard, but never enough to warp the display. For one thing, the display contains a glass sheet, and a metal frame, and those aren't going to warp. There's also some relatively soft plastic in the LCD display's frame, but the metal frame and the glass sheet prevent that plastic from warping. There's a remote, theoretical possibility that if a Mac portable were to get ESPECIALLY hot for some reason (like the battery overheating, like a rare few do), the heat might go up through the keyboard and cook the LCD, causing it some damage like discoloration of the displayed colors, but it's very unlikely, and I've never heard of it happening.



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