Hi John, Good diagnosis process. Yes, it does sound like the hard drive cable is the likely culprit. Macbook Pros can be notorious (especially later models) for having HDD cable issues. Having the board connectors fail is much, much less common, and the only way to confirm that is to use known good cables and drives. Here's the cable you're looking for. Double check it's the right one for your model machine. MacBook Pro 13" Unibody (Mid 2009-Mid 2010) Hard Drive Cable Happy repairing, Andrew
We have guides for both 5s and 5c display replacement. Please see following links:
5s - iPhone 5s LCD及数字转换器更换教程
5c - iPhone 5c 前置面板更换