So I had a go at fixing something - replacing an iPhone broken screen. I had some help from YouTube - the Official iPhone 6s Display Assembly Replacement Guide from iCracked.com. This is an excellent step-by-step procedure for doing the job. I spent almost an entire Sunday afternoon at this. I found the small screws difficult to deal with but didn't give up. Hopefully, I followed the instructions to the letter.
It didn't work.