5.5 Given a scenario, troubleshoot common issues with mobile devices Flashcards
Poor battery health
Causes of poor battery health are leaving display brightness too high, constantly enables wireless connections, constantly enabled location services, constantly enabled background data services. Could be sign of battery life ending. Turn on airplane mode to avoid battery dying or draining.
Swollen battery
Occurs when the battery is overcharged. There is a buildup of gas within the battery. The only solution is to replace the battery but you need to be careful not to punctuate the battery as a fire can start from buildup of gas. Take the device to an expert for removal or too a authorized acceptance center. Do not throw away.
Broken screen
- Time for a backup - Do this first!
- Replace the screen - No easy fixes
- The glass is sharp
–Screen protectors can help
–Use clear tape until repaired
Improper charging
- Check everything in the charging process
–Cables, interfaces - Check the cable interface
–Remove any obstructions - Check the cable
–Don’t use frayed or damaged cables
–Try a known-good cable - Verify the power adapter
–Check with a multimeter
Poor/no connectivity
When there is no wireless connectivity, it is caused by the wireless capability being disabled and the wireless antenna being bad or the cable needing to be reseated. Location makes an impact on connectivity and outdoor connectivity may help improve connection.
Liquid damage
- Many phones have a Liquid Contact Indicator (LCI)
–Turns color when liquid has been present - Power down the phone
–Don’t power it back on. Don’t do it. - Remove the case, cards, back, and battery
–If possible - Putting the phone in a bag of rice doesn’t
actually work very well
–Silica gel is better - Leave it alone
–Don’t turn it on
–Do not charge the phone
–Don’t connect it to power
–Don’t press any keys
–Don’t heat the phone
–Don’t move it around - Wait at least a day
–Or until the phone appears to be dry
–And then perhaps a few hours after that - Once you’re sure, power it on
–Hope for the best
Overheating
- Phone will automatically shut down
–Avoid overheating damage - Charging/discharging the battery, CPU usage,
display light
–All of these create heat - Check app usage
–Some apps can use a lot of CPU - Avoid direct sunlight
–Quickly overheats
When a mobile device is overheated and the battery is the source you need to get it replaced.
Digitizer issues
Symtpoms of digitizer issues are erratic behavior of the touchscreen, poor response of the touchscreen, dead spots on the touchscreen, application randomly opening and no touch response. Digitizer needs to be replaced. For some devices entire screen needs to be replaced.
- Apple iOS reset
–Press power button, slide to power off,
press power button
–Hold down power button and Home|Volume
for 10 seconds - Android device restart
–Remove battery, put back in, power on
–Hold down power and volume down until restart
–Some phones have different key combinations
–Some phones do not have a key-based reset
Physically damaged ports
Laptops have more ports than cellphones (Charging point. Use a tooth pick to clean out the charging port. Port can be replaced by phone part supplies. Laptop ports can be replaced without buying a new motherboard.
- Rough handling and accidents
–Damages the interface - Not charging - Look closely
- Not modular - Requires a system board replacement
Malware
Even on mobile devices
–The device type doesn’t matter
* Look for symptoms
–Unusual apps, large data transfers, pop up messages,
high CPU usage, device overheating, excessive
battery use
* Try a security app or scanner
–Identify malware infections
Cursor drift/touch calibration
- Random input or cursor moves without
touching the device
–Common on older screens - Use a touch calibration app
–Requires user input
–Touch certain areas of the screen - The system will adju
