回答“Why does my iPod turn off when I volume up the iPod?”This might mean several things: 1. The down button is physically pressed (Or electrical contact has shorted) 2. The headphone jack is sensing a volume button press (less likely) 3. Software is corrupt (an update might solve this) 4. Bluetooth remote. 5. If your iPod is jailbroken maybe you set something wrongly (an update/restore might solve this also)
回答“Why is my tablet charging still even with unplugged charger”You might have replaced your charging port wrongly!. Maybe you shorted two things together making it think it is actually charging
回答“Why is my rotary tool making a squealing sound?”This might mean the bearings of the fan is faulty, this problem might also cause overheating issues. More information can be found here.