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Set screen brightness in FireWire target disk mode System
If you set your Mac's screen brightness before restarting for Firewire target disk mode, the Mac remembers the setting when it boots up in the mode. So if you want to conserve battery power or backlight life on your portable when you connect it to your desktop, you can turn off the backlight before you restart and it will stay off.

If you elect to turn off the backlight completely, make sure not to hit the power button accidentially. It would be possible to forget that the unit is in disk mode and then hit the power button to turn it on. But since it's already on, the power button would turn it off without unmounting from the host unit and probably corrupt data. So be extra careful in this case.
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Set screen brightness in FireWire target disk mode | 9 comments | Create New Account
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Set screen brightness in FireWire target disk mode
Authored by: Azark on Jun 29, '04 10:02:31AM

I always thought it was a bit stupid not to implement a screen saver or dimming feature for portables in Target disk mode.

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PB Ghz 1024MB Combo 10.3.3
G4 400 AGP 768MB 10.3.3



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Set screen brightness in FireWire target disk mode
Authored by: cmdahler on Jun 29, '04 10:23:19AM

It's possible to start up your PB in target disk mode and then close the lid. The backlight turns off when you do that. The only concern I have about this is heat. The bottom of my PB gets pretty warm after a while with the lid closed in target disk mode, and I know that PB's are engineered to shed some heat through the keyboard. Does anyone know if the fan will automatically come on in target disk mode? I've never heard it start up on mine.

Chris



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Current powerbooks do not overheat with the lid closed
Authored by: PeteVerdon on Aug 19, '04 03:18:45PM

Current powerbooks do not overheat with the lid closed.

Older models dissipated heat through the keyboard, but the current ones use the bottom of the case as a heat sink instead. This means that you can use it with the lid closed with no problems, as the manual explains.

The only limitation is that it must be plugged in to a keyboard, monitor and power supply - I suspect this allows the machine to be reasonably sure that it's not in a bag. I'm grateful for that, because otherwise there's a risk I might pick up my "turned off" powerbook and put it in my bag where it might well overheat.

Pete



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Set screen brightness in FireWire target disk mode
Authored by: Fofer on Jun 29, '04 10:43:44AM

The fact that the Firewire logo glides around and doesn't stay in any one spot for too long... that *is* the screensaver, no?



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Set screen brightness in FireWire target disk mode
Authored by: Chevron on Jun 29, '04 10:51:12AM

No, LCD Screens don't suffer from Burn-in like desktop CRTs, the best way to save any screen is to have it off completely, not even just dimming the screen. I know my 18 month old PB suffered greatly from having the screen on all night, even though the backlight was off, because I dont think the LCD turned off.



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Set screen brightness in FireWire target disk mode
Authored by: johnsawyercjs on Aug 20, '04 05:06:41PM

Though the rest of the screen is black while the Firewire icon is moving around, the backlight is still on, generating heat and draining battery power--the display has just flipped most of the pixels to black, which doesn't reduce backlight brightness--that's why you can see the Firewire icon.



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Remembering it's on
Authored by: Stereo on Jun 29, '04 10:39:34AM

I put a coin on the power button to remember not to press it.



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Set screen brightness in FireWire target disk mode
Authored by: Sjuul on Jun 30, '04 09:06:25AM

Instead of fiddling with the brightness control, I just restart my PowerBook in target-mode and then put a small magnet on the touch pad. It then thinks the lid has been closed, and switches off the back light.

Contrary to what some posters think, LCD screens do suffer from burn-in. I saw a flatpanel iMac in a store the other day which had the logon-window very cleary burnt into the screen.



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Set screen brightness in FireWire target disk mode
Authored by: GlowingApple on Aug 20, '04 10:24:14AM

This is a very good reason to get an iSight. Not only is the iSight a high quality portable camera, but it comes with a magnetic mount (as well as many other mounts). Turning off your LCD could never be easier than with an iSight; just another reason to get one for yourself!

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Jayson

When Microsoft asks you, "Where do you want to go today?" tell them "Apple."



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