Went the “long trail” following all the steps: it worked. The MacBook Air screen is now flawless & it works fine. I wonder now whether I could have skipped the steps noted in comments. If ever again I attempt, I may try the short cut. But: THANKS for the excellent step-by-step. You have my gratitude. Enjoy your life!
My plastic tab pulled off the connector. I worked the connection apart using two spurgers, slowly backing it out side to side.