Yeah! Fixed it!

我的问题

Defective cable for internal hard drive

我的修理方法

Totally easy! Took less than 10 minutes to install cable. Apple Store refused to install cable because tech noticed some sticky reside on logic board. Very minor and I removed the reside myself. Installed the cable, and now my mid-2012 Macbook Pro has new life again. 5 years going and strong!

我的建议

You can do it! Buy the part. Take your time. Install it. You can fit it!