Using Powerbook as a desktop: HDD/battery heat bad for the display?

I'm planning on hooking up my 12" powerbook to an external monitor and use it as a desktop. The Powerbook's display itself is in 100% working order, and I would like to take it with me to use while traveling.
What I worry about is the heat from the HDD, the battery, and the fans - they get pretty hot sometimes when the computer's on. And since using the Powerbook as a desktop would require the display to be closed at all times, would the heat damage the display?
Please share any thoughts and/or experience you may have concerning this.
Thank you!

Usually, the fans don't turn on when my lid is closed, but then again, I'm not doing the same thing you're doing, using it as a "desktop" with an external monitor.
What you can do is leave your lid open, designate the external monitor as the primary screen while the PowerBook's LCD screen becomes the secondary one. Then, you can dim the screen to "zero" on your PowerBook while the external remains on and the primary.
You do this by going to System Preferences and the Displays icon, and on the resulting screen--you have to be connected to your external monitor to do this--click on the "Arrangement" tab and you'll get a screen that lets you drag a bar from left to right.
This bar represents the menu bar and dragging it to, say your external is on the right, will make the square on the right your primary, while on the left side, the square will represent your PowerBook's display and become the secondary monitor.
Hope that made sense. Plus, I don't remember my PowerBook's fans running when I did try that once. Used the PowerBook connected to an external monitor while the display was closed and running as a "desktop." Any which way, closed lid or not, it's the same principal. The only thing you get is something unsightly if you don't like the idea of having your laptop out next to the display and keyboard. As opposed to tucking it away somewhere.

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