Model A1181: 1.83, 2, 2.1, 2.13, 2.16, 2.2, or 2.4 GHz Core 2 Duo processor

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Replaced inverter, now makes noises.

MacBook 2008 OS 10.6.8

The backlight started to fail randomly so I took my MacBook to a repair shop and they replaced the inverter. The backlight works fine now.

The problem now is:

Whenever the backlight is not at minimum or maximum, the inverter makes a noise, like a whistle.

They have tried different inverters, which still did the same noise. They told me replacing the screen will solve the problem, but that costs 100€ and I don't won't to invest this money on such an old laptop.

The noise responds to the level of light in the screen. The pitch gets higher and lower depending on the backlight. Also, for some positions of the screen the noise gets louder.

My question is:

Why does this happen? Is it that the inverters they are trying are cheap ones? Is it maybe that I have to replace the inverter cable too?

Thank you, and excuse my English.

Answered! View the answer I have this problem too

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It wont be the cable. Sounds like the inverter is making noise possibly from the transformer due to the filter capacitors.

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Where did you buy this inverter?

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Chosen Solution

@Tim - Here's the location of the inverter and how to get to it: MacBook Core 2 Duo Inverter Replacement as to finding the part heres the part: MacBook Display Inverter

MacBook Display Inverter Image

Product

MacBook Display Inverter

$14.95

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Thanks for your answers. I bought the inverter at the IFIXIT Store. It's very expensive to send the inverter back to IFIXIT. So I've decided to buy a second hand MacBook and my problem is solved.

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Try this!

MacBook Display Inverter

MacBook Display Inverter Image

Product

MacBook Display Inverter

$14.95

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Miquel will be eternally grateful.
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