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The MacBook family was first introduced in May 2006 and replaced the iBook as Apple's consumer laptop.

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The display back light doesn't work all the time when logging in?

When the laptop has been closed and I open it the screen appears to be just black but if you look closely enough you can see the log in box. If the cursor is in the right place then I can log in but other wise I have to keep firmly opening and closing the laptop until the screen lights up. If that doesn't work after a few attempts then I have to hold down the power key.

What could this be as it is very intermittent?

Nothing has been spilt on the laptop and nothing else appears to have been broken.

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This is problem of 3 parts : Lcd itself, LVDS Cable , Inverter Board .

First try with display brightness by pressing F1 or F2 . First Lower the brightness by F1 then press F2 one time only. If light Blink then its a problem of Lcd or Inverter Board .

Second: Try to move the Display lid up and Down if light comes at certain angle then it looks like problem of Display cable .

Try these steps if Symptom is one of these then buy that part .

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Thank you - I will try these next time is happens and let you know.

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