Won't boot, swapped RAM, HD...is it my logic board?

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MacBook Core Duo

Mid 2006 / Model Number: A1181 / black or white case / 1.83 or 2.0 GHz Intel Core Duo processor

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BChristel @bchristel

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发帖于: 2011年3月6日

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Won't boot, swapped RAM, HD...is it my logic board?

Hi all-

I've got a MacBook that will only boot 1 in 10 times and I dont know what's preventing it the other 9. When it does boot, it doesn't make it very far before it shuts off.

Usually I get a startup chime, dvd and HD spin up, and then power off.

Tried reseating RAM, using only 1 of 2 sticks, using RAM from my MBP, didn't change symptom.

Put in known good Hard drive, still no change.

I got it to boot into the Snow Leopard DVD which then told me it didn't have enough RAM. OOPS! Tried Leopard, and now it shuts off right after the DVD check.

The battery charges when it's not on, but my best luck is when I leave it boot on battery power alone. Still doesn't work all the time...

Do you think it could be the power supply board or is it the whole logic board that's dead?

Thanks in advance for any advice!

Brandon

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What is your RAM configuration?

由 mayer 完成的 2011年3月6日

Just one question: any liquid spilled on this macbook?

由 lemerise 完成的 2011年3月6日

The original 2x256MB was installed so when I was trying with one stick it was only 256MB total. I tried with 2x2GB from my MBP one at a time and both at once. Still no dice.

Don't think there was any liquid spilled...but I can't say for sure. I cleaned off some whitish corrosion on the ram with some alcohol which tells me it wasn't clean for it's whole life....

Thanks for the help!

由 BChristel 完成的 2011年3月6日

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The original 2x256MB was installed so when I was trying with one stick it was only 256MB total. I tried with 2x2GB from my MBP one at a time and both at once. Still no dice.

Don't think there was any liquid spilled...but I can't say for sure. I cleaned off some whitish corrosion on the ram with some alcohol which tells me it wasn't clean for it's whole life....

Thanks for the help! — BChristel

mayer @mayer 声誉积分: 689.4千 3.8千 1.1千 2.6千 · Answer 1 · 2011-03-06T19:13:26-07:00

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mayer @mayer

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10.6 General requirements

Mac computer with an Intel processor

1GB of memory

5GB of available disk space

DVD drive for installation

You may have gotten an incomplete system installation. The RAM from you MBP may not be the same type as used in your Mac Book. Before you spend money on a RAM upgrade, I would reformat the drive and use the write zeros option to clear any bad blocks. Then install a system from your original installation disk. If this works, then upgrade your RAM and install 10.6. If the drive will not accept the old system or you can't format it then replace it.

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Right now the drive is formatted (not zeroed, but clean format in an enclosure). The only drive that should be bootable is the 10.5 DVD that's in the disk drive, but it turns off before I can hold down "c" or see the spinning wheel. I don't think it's even getting to the DVD drive before it turns off.

由 BChristel 完成的 2011年3月6日

Did you have a 10.4.8 disk that came with the Book? (Only needs 256 MB of RAM) What happens when you try to boot without the battery? Will it boot with the internal hard drive removed and just the 10.5 from the internal optical drive?

由 mayer 完成的 2011年3月6日

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MacBook Core Duo

Won't boot, swapped RAM, HD...is it my logic board?

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