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Device is not charging
I only have 1% of battery left and my device is not charging!
Charger is broken
Try using an alternate working charger to charge the device. If it charges, you know that it is the charger that is broken, and a new one is needed.
Battery is not holding a charge
If a working charger doesn't charge the device, replacing the battery may fix your problem. Refer to the battery replacement guide here.
Camera is not working
I can't take selfies with my BFF!
Software is frozen
Restart the device and try using the camera again.
Camera is broken
If the camera still does not work after the device has been restarted, refer to the camera replacement guide here.
Flex cable is broken
If the camera is still not working after the camera has been replaced, the flex cable (what connects the camera to the motherboard), may need to be replaced. Refer to the flex cable replacement guide here.
Buttons are not working
My sleep button is not working and I keep pocket dialing people!
Buttons are sticking
If the buttons stick, try cleaning them using a small brush.
Sound is not coming out
I can't hear my favorite song!
Volume is on low/mute
Check to see if the media volume on the device is low or on mute. Keep in mind that sometimes there are in-app volume controls as well as device settings (Settings>Sound>Volume) in addition to the volume buttons for the phone. (When in the "Sound" settings page, make sure you are not in Silent or Vibrate mode)
Software has issues
Try restarting the device and see if sound comes out.
Speakers are not working
Try plugging a pair of working headphones into the audio jack. If sound comes out through the headphones but not through the speakers, you may need to replace the motherboard (which holds the speakers). Refer to the motherboard replacement guide here.
Audio jack is not working
If sound comes out of the speakers but does not come out of working headphones when plugged into the audio jack, you may have to replace the audio jack. Refer to the audio jack replacement guide here.