Could someone explain the whole LED, softbutton, cable thing please. Are the white things LEDs or capacitive sensors. Do they stay stuck to the board or to the cable, when removing the daubo ? I’ve seen it both ways.

After fitting a new daughterboard, it all works apart from the two capacitive buttons. The daughterboard, as purchased, has some white things in the little black touch cables. It’s not clear what these are, and whether they replace the ones that are already there. Are they LEDs ? They look like some looped pcb track. How much am I supposed to peel the little white tabs of the touch-button tails after purchase ?

I replaced a rev8 board with a rev6 and it does not charge. The USB won’t even get recognised by the PC. I also have a blue and a white antenna cable. Mine is a S5 (LTE?) SM-G901F UK EE. I also get no 3/4G signal. I put the old one back in and all works (except loose connector, which is why I was replacing it)