OK I broke the little black 'ribbon lock' off too. (sinking feeling). Then I tried to wiggle ribbon three in to the white connector - - then I realized it goes UNDER the white connector. I was trying to wedge it on top of the white connector, and under the black ribbon lock. I managed to get it under the white connector as securely as I could. Then I had to even-more-carefully put connectors 1 & 2 back on. Voila. Power up - - - almost everything works. Only thing still questionable is hearing phone thru the earpiece - - have to use speakerphone . . .
i have exactly the same as you, i hope the speaker does not rely on that small connector!
