Mid 2010 Model A1278 / 2.4 or 2.66 GHz Core 2 Duo processor

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Won't boot after attempted SSD install...

I copied my hard drive on to the Samsung 850 EVO 250 GB SSD and booted from the drive to test it, everything worked fine.

Tonight I removed the hard drive and installed the new SSD. I also replaced the RAM to maximum 8 GB.

I tried to start the laptop and the power light comes on but nothing on the screen. I put my original hard drive back in and it still doesn't work.

Please help!

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3 Answers

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Hey Christie,

Try this:

1. Shutdown your MacBook if it isn't already turned off.

2. Turn your MacBook on and immediately hold down the Option Key.

3. Wait until you see an image of a disk and then release the Option key.

4. Use your arrow keys to select the drive you want to use as the startup.

After installing the new SSD your device might not have automatically set the SSD as the target startup disk.

If this doesn't work, check to make sure that there are no loose connections.

Best of luck!

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I installed my original ram and both hard drives work now!? I was installing 2x4gb of crucial ram...why would it cause my computer to not turn on?


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RAM issues can cause a system to not start up at all. Usually there is a continuous set of 3 beeps that will let you know you have a RAM issue. You can check crucial's site and use the system scanner to see if the Crucial RAM you have is compatible with your MacBook. If it is, you might just need to reseat the RAM and try to boot up again. If reseating the RAM still doesn't work then the only other thing I can think of at the moment is a faulty RAM. You can check to see if one or both is bad by trying to boot up with one of the Crucial RAM at a time. Just put one on and try to boot up. If it boots up with one and not the other then replace the one that doesn't allow the MacBook to boot. If it doesn't boot up with either one, then get the RAM replaced and make sure you get one that is a confirmed match for your MacBook.

Here is what your MacBook will Support: 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; supports up to 8GB.

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Had the same problem. Found the SSD connector not made as thick as HDD connector this causes the contact problem. Quick fix is to cut two thin pieces of printer paper to use as shims to wedge the contacts together. Make them long enough so you can hold them in place as you insert the cable with the SSD.

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