On Sat, Mar 20, 2010 at 7:25 AM, Tom and Lisa Peters <[email protected]
> wrote:

> On Mar 19, 2010, at 9:11 PM, Jim Scott wrote:
>>
>>
>>>  On Mar 19, 2010, at 8:53 PM, Clark Martin wrote:
>>>
>>>   On 3/19/10 9:35 PM, Tom and Lisa Peters wrote:
>>>>
>>>>>
>>>>>>  I disassembled my G3 iBook 500 and I have lost the little magnet that
>>>>>>  goes just under the keyboard. Can someone tell me what it's for? I'll
>>>>>>  get one if necessary.
>>>>>>  I'm sure it'll show up somewhere, some place.
>>>>>>
>>>>>>  John Carmonne
>>>>>>  Yorba Linda USA
>>>>>>
>>>>>
>>>>>  Sleep sensor. Without the magnet, the book will not sleep if you close
>>>>>  the lid.
>>>>>
>>>>
>>>>  I don't know if there are two magnets or one that does double duty but
>>>> there is also a magnet that pulls the hook down as you close the lid.
>>>>
>>>
>>>
>>>  There are two magnets. One is a small rectangular piece that's glued to
>>> the bottom side of the top case in the lower right corner right by the
>>> keyboard opening. The other is the bottom latch mechanism which has been
>>> magnetized to attract the latch hook in the LCD assembly.
>>>  -- Jim Scott
>>>
>>>
>> The one that's missing is about  6.5mm diameter and 4mm long. it fits in a
>> screw hole in the center top opening for the keyboard in the vicinity of the
>> numlock key.
>>
>
> Oh, that one.....  As far as I know its only function is to help keep the
> keyboard down flat...... I think.... I usually never bother with it when
> rebuilding units.....
>
> Yep, that's the function of that little bugger, which I forgot about too.
Unless the little screw head/lock tab (in the center of the numlock key) is
turned to lock the center of the keyboard, the top of the keyboard tends to
"trampoline" during typing. So Apple came up with an alternate fix. It put
that teeny little magnet on top of the special screw. Then, because the
keyboard plate is aluminum, a small steel disk was glued to a vinyl sticker
which was affixed to the aluminum keyboard. This was supposed to "lock" the
keyboard top center in place. As with all things Mickey Mouse that involve
glue, most of those steel stickers came loose, disappeared, etc. years ago,
leaving the magnet with nothing to do. Which is just as well. They require a
dental pick to remove, and I've gotten quite adept at popping them up
sideways, then grabbing them with tweezers. I've got a nice stack of them
hanging off the side of a steel work light. :^)

You're not going to like to hear this John, but if you remember removing
that magnet, you'd be well advised to find where it went. It probably found
a nice attractive piece of steel somewhere inside your iBook, which means
it's not going to come loose. On the other hand, can you continue to use the
iBook without knowing where the magnet went, or what it's stuck to?

Been there, done that, too.

Jim Scott

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