Fixed: Not working vibrate switch, no ringer. Always on silent
I have an iPhone 4 that for some reason stopped ringing. I would slide the vibrate switch to mute and back to ring but it would not vibrate nor would it show up as the bell or bell with a slash through it on the display.
I purchased the headphone jack & volume control cable and used the guide to swap out my old cable with the new one. This was no easy feat and took almost two hours. The hardest part was peeling the old cable from the metal switches and transferring the metal switches to the new cable. It was also difficult to remember the correct orientation of the bends in the cable to make it fit snugly.
I would recommend taking a photo of the cable before removing it so that you can reference it during reassembly. Thank you iFixit for the part and the guide. My phone works as new again and I am not longer missing calls!