Go Back   MacRumors Forums > Apple Hardware > PowerPC Macs

Reply
 
Thread Tools Search this Thread Display Modes
Old Oct 23, 2010, 07:47 PM   #1
lPHONE
Banned
 
Join Date: Nov 2009
Cool What is this little magnet for?

I have replaced many of LCD in PowerBooks and one of the things I noticed is after you remove the aluminum panel there's a little round magnet on the back of the LCD... What is this for?

I have also seem a handful of cases where pressure applied to the back panel has caused this magnet to crack the LCD.
lPHONE is offline   0 Reply With Quote
Old Oct 23, 2010, 07:49 PM   #2
Intell
macrumors P6
 
Intell's Avatar
 
Join Date: Jan 2010
Location: Inside
It triggers the reed switch. The reed switch's job it to detect if the lid is open or closed.
Intell is offline   0 Reply With Quote
Old Oct 23, 2010, 08:34 PM   #3
lPHONE
Thread Starter
Banned
 
Join Date: Nov 2009
Quote:
Originally Posted by Intell View Post
It triggers the reed switch. The reed switch's job it to detect if the lid is open or closed.
How's that even possible? This is in the center of the LCD where no circuitry is even close. Unless the magnet goes through the LCD and the trackpad and the reed switch is underneath?
lPHONE is offline   0 Reply With Quote
Old Oct 23, 2010, 08:39 PM   #4
Intell
macrumors P6
 
Intell's Avatar
 
Join Date: Jan 2010
Location: Inside
The switch is under the track pad. That little magnet is powerful enough to trigger the switch, even through the screen and track pad.
Intell is offline   0 Reply With Quote
Old Oct 24, 2010, 12:30 AM   #5
Epsilon88
macrumors 6502
 
Join Date: Oct 2009
That confused me too! Yep, it's the reed switch.
Epsilon88 is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > PowerPC Macs

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
iPad: Magnet Cover For Back? ghsNick iPad Accessories 2 Dec 14, 2013 01:00 AM
iPad: Magnet Power! Cabby iPad Accessories 0 May 22, 2013 12:33 PM
iPad: Fingerprint Magnet Fed iPad 20 Jan 11, 2013 04:27 PM
Cousin took a magnet to my MBP mg2090 MacBook Pro 23 Aug 8, 2012 09:25 AM

Forum Jump

All times are GMT -5. The time now is 04:11 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC