replaced the hinges and now it won't sleep

I had to replace the hinges and that meant a complete tear down and everything went well but it is now reassembled and when it is running and I close the lid it will not sleep what have I done wrong?

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Unlike the other iBook models the 14" 1.42GHz and the 12" 1.33 G4 iBooks have a different setup for the magnet and the reed switch sensor that triggers the sleep mode. On these models the magnet is screwed to the middle left side of the the display and the reed switch board is located on the optical drive and it's cable connect to a socket near the keyboard socket on the logic board.

I think that you forgot to take off the screwed magnet from your broken hinches assy and installed your new hinges assy without the magnet. Check your broken hinges assy if you still have it, unscrew the magnet and reinstall it in your display.

To test the sleep function, find a magnet and pass it over the right side of your iBook just over the optical drive. Your iBook should go to sleep if the reed switch board is well installed and the cable connected to the logic board. Then pass over the magnet (or a metal clip) on the right side of the lid (about in the center over the bezel) and if the magnet is installed the magnet or the clip should stick to the lid.

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In most iBooks, there is a rectangular magnet underneath the topcase, just to the right of the bottom-right corner of the keyboard. When you close the screen, this magnet makes contact with a component in the screen casing, and the computer goes to sleep. So if an iBook is failing to sleep when the screen is closed, the first thing I do is to make sure the magnet is present and in the proper location. If the screen was put back together incorrectly, that could also account for this situation. There is generally an outline in the underside of the topcase designating where this magnet should go.

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