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Question: No light on display at startup, why?

Hi, I have a Macbook early 2009.

Some days ago I saw that when I move the display the screen turned off. My tech said that was the inverter cable, changed with one original part and now the screen works perfectly in every position. Works great except for one thing: when I turn on the Macbook the screen (before Apple black logo) just turns off (I see the Apple logo if I use torch from my phone). When the OS is ready I press F1 to set the backlight to 0 and then I press F2 to turn the backlight up again and then the backlight works perfectly for hours and hours. It happens only on boot and, sometimes, in the firs minute after OS ready, but I "fix" it only changing the light using F1 and F2. So I don't think it's an hardware problem..

I thought it was a software problem so I format all with Snow Leopard. Nothing. Updated to El Capitan. Nothing again.

What should I do?

Thanks all 🙂

Posted on


May 28, 2018 12:26 PM in response to Andree88 In response to Andree88

Sounds like the backlight control is malfunctioning. Sadly there's not much you can do considering the age of the unit and its not being classified as Vintage.

Best bet would be to replace the display once again, although it's nothing I'd recommend, most 3rd part parts can damage the entire unit.

Best of luck!

May 28, 2018 12:26 PM

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May 28, 2018 12:34 PM in response to SimplyPONtus In response to SimplyPONtus

Why it do this problem only after boot?

Should I try to buy a new inverter (I have changed the inverter cable with a new one..)?
I don't know if it's the display, because it works perfectly for hours except at begin (when I have to reduce brightness to 0 and turn it back at least a 1..

Thanks for reply 🙂

May 28, 2018 12:34 PM

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Question: No light on display at startup, why?