Trouble-shooting 5.5 - mobile devices

Question 1

replace laptop motherboard

Answer 1

1. power off, flip over
2. remove battery, screws
3. remove RAM & hd covers
4. Remove RAM, slide out hd
5. disconnect cables, CD/DVD
6. Remove keyboard & cables
7. Remove fan, heatsink from CPU
8. graphics adaptor? remove
9. remove wireless adapter & peripherals in the way
10. unscrew, remove, replace mboard
    *label screws & cables

Question 2

most common isses with replaced motherboard

Answer 2

• cables not properly reconnected
• adapter/RAM not firmly seated

Question 3

keyboard issues

Answer 3

1. test external keyboard
2. check internal keyboard connections & settings

Question 4

memory effect and notebook computers

Answer 4

A notebook computer’s battery is affected by the memory effect. - Nickel Cadmium (NiCad) batteries remembers how full it was during its last use and will not charge beyond that level. Other notebook computer batteries do not have this problem.

If the battery will no longer charge properly
- verify that the physical connection is secure & plug snuggly fits
- drain the battery’s power
- replace the battery with a new one.

Question 5

Intermittent wireless

Answer 5

= radio frequency interference (RFI) eg microwaves & cordless phones - keep router away
- research the frequency in use on your wireless network: have you deployed any devices that could be causing the problem?
- increase the signal strength on the wireless access point
- internal wireless card - internal cable connections for the wireless card last

Question 6

Ghost cursor/pointer drift/touch calibration

Answer 6

track pad is too sensitive?
- change the sensitivity settings
- try installing the latest driver for the touch pad
- disable the touch pad and connect an external mouse
- Google Phantom Cursor to troubleshoot various devices
not responsive or is inaccurate?
- recalibrated: update the drivers & use the device’s calibration software

Question 7

No wireless connectivity

Answer 7

device has been disabled?
* Wi-Fi is enabled / Airplane Mode off
- Read vendor documentation for function key combination that can be used to enable/disable wireless
- can also be disabled in Device Manager
- check the wireless card to make sure that it is seated properly and attached to the antenna
- Replace the wireless card or antenna?
* Wi-Fi is enabled / Airplane Mode off

Question 8

No Bluetooth connectivity

Answer 8

Diasbled? Airplane?
- research the function key to enable
- check wireless card: seated? attached to antenna? do they needto be replaced?

Question 9

Cannot display to external monitor

Answer 9

display settings set to the internal display?
- function key to cycle through the different display options
- check the cabling to the external monitor
- display device itself is set to the appropriate source.?

Question 10

Touchscreen nonresponsive

Answer 10

• clean the touchscreen, remove protectors first)
• reboot the device
• may need to be repaired or replaced

Question 11

Overheating

Answer 11

remove protective case, out of direct sunlight, shut down apps you are not using, or buy a glare screen and turn down the brightness
Finally, turn your mobile device off or put it in Airplane Mode when not in use.

Question 12

Swollen battery

Answer 12

replace immediately, could leak/explode
due to: overcharging, wrong charger, manufacture defect

Question 13

Malware

Answer 13

• install malware software to identify and help remove the malware
• delete any unauthorized applications the malware may have downloaded
• In extreme cases you may have to wipe and reboot your device.
• Encrypting your device, clearing browsing history, and having strong passwords can help minimize the risks posed. You should also ensure that all devices have some sort of anti-malware software installed and running in the background.

Question 14

Digitizer issues

Answer 14

digitizer converts analog signals from touch into digital
To replace: power off the device and remove the battery. Then using a sharp blade, remove the glued down digitizer as well as remove any excess old glue. Then you can place the new digitizer and reassemble to battery

Question 15

Liquid damage - red SIM

Answer 15

• remove the liquid from the device/device from the liquid)
• power down, remove the battery & send it for safe disposal
• Next, remove the SIM card and check whether any of the liquid contact indicators have turned red. If they have, it is likely several components have become exposed and are likely to become corroded and will need to be thoroughly cleaned or replaced.
  Placing a mobile device overnight in a bowl of rice can sometimes help to remove the moisture.

Question 16

Poor/no connectivity

Answer 16

device should be restarted (prolonged times without shutdown can reduce connectivity)
* Other issues that can occur are low signal strength, aging SIM card, or having data disabled/blocked.

Question 17

When a mouse that is connected to a docking station is moving erratically, it is often because

Answer 17

the mouse has dirt and debris built up in the trackball area (so clean it)
*if the problem were with the connection, the mouse would not work at all.