The power volume flex cable is the backbone of your iPhone 5’s power and volume buttons and is responsible for connecting those buttons to the logic board of your device. Its malfunction can cause those buttons to become less responsive or lose their clicking action. Also, in addition to the power & volume buttons, this flex cable is responsible for the Mute Switch on your iPhone 5 as well. If you are having problems with your iPhone 5’s power or volume buttons such as not being able to power it on or not being able to control the volume, then chances are that your iPhone’s Power Volume Flex Cable needs to be replaced. By replacing this part you will be able to restore the functionality of the silent switch, volume and power buttons and make them work like they used!