原帖由： Rohan Samal ,
Step 1: Clean and use the original charger/power adapter. Different chargers deliver different amounts of power. Overcharging or undercharging the device can cause it to charge slowly (or not at all) or even damage the battery and charging abilities of the device. If you're not using the original charger, these troubleshooting steps may not resolve the issue. Check and blow into the device's power port to remove any lint or dust that may be preventing the device from charging properly. Step 2: Plug the device into a working wall outlet. Step 3: Depending on the state of your device, do either (A) or (B) below: (A) If your device turns on and has enough charge to current stay on, check for the latest Android OS and restart your device. Go to 'Settings' > scroll down to 'System' > click 'About phone' (or tablet) > click 'System updates.' Let device update and restart. If your device is up to date, manually power the device off and then back on. If your device isn't charging after powering the device on, go to the Step 4. (B) If your device shows the low battery/charge icon when you try to start your device, go through the Android boot loader to get the device to charge. With the device turned off and based on your device, do the following: Press and hold Volume Up + Volume Down + Power. The device should load a boot loader screen with a picture of an Android and the word 'Start' with highlight around it. Use the volume buttons to cycle through the options until you see 'Power off.' Then press the power button on the device to select the 'Power off' option. Unplug the device and quickly (within 10 seconds) plug it back in. The device should charge normally. If after one minute your device isn't charging, go to Step 4. Step 4: Other Troubleshooting. Try charging through a different power outlet. If possible, try charging through a computer using the USB cable. If possible, try charging through a different adapter. If possible, try charging a different device (tablet, phone, or Bluetooth) to see if the charger works. I know you mentioned that you have to hold your cable at a certain angle for it to charge. If the charging port feels loose, please reply back. Step 5: Factory Data Reset The reset will erase all your personal data, so please back up any information you want to keep. Here are directions on how to backup your personal content from your device: How do I backup my Google Account? Google accounts do not need to be backed up. When prompted to log in, simply use your Google username and password. How do I backup my app data, WiFi passwords, and other settings? 1. Go into Settings and then Backup & reset. 2. In Backup & reset: o Make sure 'Backup my data' is checked. o Make sure 'Back up account' lists your email address. o Make sure 'Automatic restore' is checked. 3. Complete. How do I backup my Pictures and Videos? 1. Download the Google Drive app. 2. Once downloaded, start the Google Drive app. o Sign into your Google account. o Accept the terms and conditions on the app. 3. Go into the Gallery app (photos and video): o Touch the folder that has media they wish to save. o Select the photos and videos you wish to save: § You can do this by touching the 'three vertical boxes' on the upper right and touch 'Select item' and then touch the photos and videos you wish to save. o After all the media is selected, click on the 'share icon' (located to the left of the trash can): § Touch 'See more' and then touch 'Drive'. o A screen will appear that shows you what you selected and your email address as well as the Google Drive folder that the files will upload to: § If you would like to change or create a new folder, touch 'my drive' and on the upper right touch the 'plus folder' icon which will create a new folder name. o Touch 'Ok' and the selected media files will be uploaded to (and later can be retrieved from) Google Drive. How do I backup my downloaded apps? 1. Your downloaded apps are tied to the Google Account that they used to purchase/download the apps. 2. Your In-App purchases may be lost (examples: coins, add-ons) and In-App progress may be lost (game progress). This depends on the developer of the App. 3. After performing a Factory Data Reset, some of your previously installed apps will re-download again automatically while others will need to be manually installed: o You will not need to pay again for paid apps. o App data and settings are saved via the instructions above (How do I backup my app data, WiFi passwords, and other settings). How do I backup my music? Personal side loaded music: This music will be lost during the Factory Data Reset process. To prevent this issue you can use "Music Manager" on your computer to upload your music to your Google Play Music Library. Once uploaded, the music available and retrievable via the Google Play Music app. Music purchased from (and uploaded to) Google Play Music: This music is already synced with Google Play Music and can easily be restored later through the Google Play Music app. After you have backed up all of your personal content, do the following to perform a factory data reset on your device: 1. Go to 'Settings > Backup & reset.' 2. Press Factory Data Reset. 3. Press Reset After the factory data reset is complete and your device reboots, sign into your device using the same primary Google account you used to sync your purchased apps and other content.