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Mac duo 1181 Replaced inverter and still no back light

Laptop works with external monitor, no backlight on laptop, screen display is working correctly(minus light). Laptop LCD would flicker on when it first boots up and then goes off. Or when I start it up from sleep it also flickers on for a moment. I Read through repair FAQ's Bought Inverter From iFixit and replaced it with no change. Inverter cable checks out.

Could the LCD (backlight) be bad even though it lights up for a moment during wake up and booting up as well as lowering brightness and then increasing it.

Could the replacement part I bought from iFixit be bad?

If it is the LCD ( backlight) why would it work for a moment and then turn off. Reset SMC with no change. This seems to be a common problem I don't see the successful resolutions.

What are my options.

PS love the Tool kit it will be paying for itself in a very short time.

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It's possible the CFL's in the display have gone. Just like your office florescent lights they can spark on then go off when your turn them on. Make sure you have the brightness/power settings correctly set (via the external monitor) and try resetting the SMC first.

You can replace the two CFL's in the display unit or exchange out the display completely. Changing out the CFL's is a delicate job as they are very fragile and you do need good soldering skills, while swapping out the display takes less effort.

You also may have a bad replacement inverter and/or the cable to the display maybe damaged.

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All setting are correct or on full. I already spent a couple hours replacing the inverter. replacing the whole display would be a time saver compared to replacing the CFL's

Cable was good, I have no way of testing the inverter to see if it is bad.

It looks like I will have to find another display and try that. It might be awhile before I have time for that but will post the solution when I do.

Thanks for your response

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