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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Occasionally powers down (instantly) + LCD light occasionally dies

MacBook 13 2.0GHz Core2Duo A1181 UK/Late 2007

a few months back my machine was powered off but connected to the mains. lightning must have hit the lines the other side of the island -- the screen flashed momentarily, and a little 'dink' / 'pop' sound... I was awake, and saw it happen.

since that time I have had quite a lot of intermittent trouble. The battery has popped ( finally I am ordering a new one ). so it is running purely from the Powerline.

occasionally it just turns itself off. This happened twice today. Both times shortly after I had plugged in either the iPhone or the iPad. So I think it is some power issue... I'm contemplating getting a replacement MacBook MagSafe DC-In Board MacBook MagSafe DC-In Board

there is a second problem with the LCD turning itself off, and this seems to be completely separate. I remember a while back shining a torch and noticing that the pixels are still getting lit.

I am running an external monitor as well, so while I am working, the LCD would just go black sometimes. and to bring it back on I would have to either

a) close and reopen the lid, or

b) going into Control Panel/ displays and check and uncheck ' mirror displays '

I reformatted my hard drive and reinstalled OS X last week. Still both problems have persisted. Yesterday I changed my power settings to prevent the display from ever going to sleep, and this appears MAYBE to have fixed the latter issue... over 24 hours and I haven't had a single powerdown. but I would need to leave it a week before I could say for sure.

so far I haven't found any way to make either symptom repeat.

I am wondering whether a Display Inverter MacBook Display Inverter would be likely to help.

can anyone offer some guidance? Am I wasting my time? are there any tests I can perform? Am I missing some solution paths?

Many thanks for your time,

Pi

Answer this question I have this problem too

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If the external monitor also goes out, then that means that its not the inverter.

Was the Macbook connected directly to the wall? If this happens a lot, I would recommend getting a UPS to prevent any of this from happening.

I don't think its the DC In board if the computer gets powered. I'm under the impression that it either works or not. But I may be wrong.

Which leads me to.. power adapter or logic board..?

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Hi Gabe, The OP said the LCD goes out but I'm not sure he said the external goes out. I think we need clarification on that. Ralph +

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SORRY my bad

External LCD continues to work fine always

Is there some diagnostic I can run?

Ps i have belkin surge protection unit now

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That rules out your GPU, so it should be your inverter. To be clear, when the light is off, and you shine a flashlight at the LCD it still works, just no backlight, correct? Have you tried to turn brightness all the way down the putting it back up? With the DC in board, I'm not sure if that is broken or if its the logic board. Have you tried another power adapter. PS: surge protection won't protect you from a brownout which can also damage electronics. If you life in an area with a lot of electricity problems then seriously consider getting a UPS.

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I need some way to reliably reproduce the problem. only then can I start to systematically attempt to figure out what is going wrong by replacing bits and bobs. I'm pretty sure it is related to power overload. Is there some diagnostic software that can max out various chips individually for a short period of time, or even everything together? it might be a heating issue as well... I'm sure things have got better since I have started using a cooling pad...

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P i will be eternally grateful.
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