HD will only work when case is open. After SSD replacement?

I've replaced the HD with an SSD in my MBP. If the case is open, it boots up perfectly. Once I screw the case closed, I get the Folder with Question Mark and the drive cannot be found.

please help!

Answer this question I have this problem too

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looks like the SATA cable is being pinched a little too much with the new drive. I rectified the problem with adding black friction tape doubled around the sata drive ribbon. Will replace cable.

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Mike good catch! Give your self credit and close your question as answered.

by Dan

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Michael will be eternally grateful.