1.0 Mobile Devices Flashcards
1.1 Laptop hardware
* Some laptops are easier to fix than others
– An ongoing learning process
1.1 Laptop hardware
* Understand the process
– The details will vary between laptop manufacturers
1.1 Laptop hardware
* Engineered to precise specifications(how easy is the repair?)
– A challenging repair
1.1 Laptop batteries
* The power source when unplugged
-How easy to replace?
-How much charge?
– May be easily replaced or require a tear down(disassembly)
– Five minutes vs. one hour
1.1 Laptop batteries
* Lithium-Ion (Li-ion) and Lithium-Ion polymer (LiPo) are common
-Doesn’t have this memory problem with charging
-Effect of charging these batteries
– No “memory effect”
– Charging the battery diminishes capacity
1.1 Laptop batteries
* Different form factor for each laptop
-What battery type do you need?
-Battery technology is _
– Battery types and styles can vary
– Battery technology is changing constantly
1.1 Laptop keyboard
* The most-used component of the laptop
- __ to replace
-What parts?
-Is it always the same difficulty to replace?
– Can be easy to replace
– A few screws and a single ribbon cable
– May not always be this simple
1.1 Laptop keyboard
* Or connect an external USB keyboard
-Portable?
– Not very portable, but works in a pinch
1.1 Laptop keys
* Check with the manufacturer’s instructions
-What parts are easy to break?
– It’s very easy to accidentally break the key cap
or the components underneath
1.1 Laptop keys
* Some repairs might require the removal or
replacement of a key cap
– This can be a delicate procedure
1.1 Laptop memory
* Some laptop memory is soldered to the system board
-Memory upgrade?
-How to get new memory for it?
– No upgrade available
– Requires a full system board replacement
1.1 Laptop memory
* Small Outline Dual In-line Memory Module (SO-DIMM)
* Memory used in laptops and mobile devices
-Benefits for repair?
– Often easy to install and replace
1.1 Laptop storage
* Magnetic disk
-What kind of disk
-What form factor(inch)
– Traditional spinning drive platters
– 2.5 form factors (3.5 inch for desktops)
1.1 Laptop storage
* SSD (Solid-state drive)
-What kind of moving parts?
-Advantages over HDD?
-What form factor(inch)
– All memory, no moving parts
– Silent, fast access time, less latency
– 2.5 inch form factors
1.1 Laptop storage
* M.2
-Form factor size?
-Doesn’t support these cables
-Installation advantages
– Smaller form factor
– No SATA data or power cables
– Easy to install and replace
1.1 Replacing laptop storage
* All internal
-How to replace?
-How to replace?
– Open a cover on the back
– Open the entire laptop
1.1 Replacing laptop storage
* M.2 drives are even easier
-How many screws to replace the drive?
– One screw - similar to RAM installation
1.1 Replacing laptop storage
* Can be very modular
-How many screws for the laptop?
– Two screws and the drive slides out
1.1 Migrating from HDD to SSD
* An impressive upgrade
-What improvements?
– Move from spinning mechanical drive to
solid state memory
1.1 Migrating from HDD to SSD
* Install an OS on the SSD
-What should be moved/installed?
-Disadvatnages?
– Move user documents between drives and Install any required applications
– Can be time consuming
1.1 Migrating from HDD to SSD
* Image/clone the HDD
-No ___ required?
- Move __ from one to another
– No OS installation required
– Move everything from one to the other
1.1 Migrating from HDD to SSD
* Imaging software needed
-Sometimes included with the _____
- Many __ and ___ options
– Sometimes included with the SSD
– Many commercial and open source options
1.1 Migrating from HDD to SSD
* Create an image file - One drive at a time
* Drive-to-drive image
-
– Image directly from one drive to the other
1.1 802.11 wireless and Bluetooth
* Wireless network connectivity
-Wireless means ___
– Connect without wires
1.1 802.11 wireless and Bluetooth
* 802.11
-What network does 802.11n standard?
-Advantages of these networks?
– Local area network (LAN)
– High speed, Internet access
1.1 802.11 wireless and Bluetooth
* Bluetooth
-What’s the network it’s used called? Range?
-What does it connect with?
– Personal area network (PAN) - Short range
– Connect peripherals and other nearby devices
1.1 Biometrics
* Sign in or unlock your laptop with a
fingerprint reader or face recognition
– Something you are
1.1 Biometrics
* Requires additional configuration in the OS
-What do you require to use biometrics?
– Hardware required for most options
1.1 Biometrics
* Relatively secure
-Why is it secure?
– Faces and fingerprints are quite unique
1.1 Near-field communication (NFC)
* Short-distance networking
-How close is it?
-What’s it used for?
– 4 centimeters or less
– Data transfers or authentication
1.1 Near-field communication (NFC)
* Common on mobile phones and smart watches
-How do people use it?
– Payment method on your wrist
1.1 Near-field communication (NFC)
* Use it for authentication without typing a password
-Places where it’s used?
– Hospital workstations, warehouses, manufacturing
1.2 Portable LCD
* Liquid crystal display
-What is it?
– Light shines through liquid crystals
1.2 Portable LCD
* Advantages
-What are their advantages?
– Lightweight, Relatively low power, Relatively inexpensive
1.2 Portable LCD
* Disadvantages
-What are their disadvantages?
– Black levels are a challenge
– Requires separate backlight
– Florescent, LED, etc.
– Lights are difficult to replace
1.2 LCD technologies
* TN (Twisted Nematic) LCD
-How old?
-Response times, for what?
-Disadvantages?
– The original LCD technology
– Fast response times (gaming!)
– Poor viewing angles - color shifts
1.2 LCD technologies
* IPS (In Plane Switching) LCD
-Advantages?
-Disadvantages?
– Excellent color representation
– More expensive to produce than TN
1.2 LCD technologies
* VA (Vertical Alignment) LCD
-Comparison with TN and IPS?
-Advantages?
-Disadvantages vs TN
– A good compromise between TN and IPS
– Good color representation
– Slower response times than TN
1.2 OLED
* Organic Light Emitting Diode
-When do they emit light?
– Organic compound emits light when
receiving an electric current
1.2 OLED
* Thinner and lighter
-Weight advantages?
– Flexible and mobile - no glass needed
1.2 OLED
* No backlight
-What provides the backlight?
– The organic compound provides the light
1.2 OLED
* Tablets, phones, smart watches
-Advantages
-Disadvantages vs LCD?
– Very accurate color representation
– A bit higher cost than LCD
1.2 Wi-Fi antennas
* Antenna wires wrap around the laptop screen
-Disadvantages?
– It’s up high
1.2 Wi-Fi antennas
* Multiple antennas
- Wifi antenna Left ___ and right _____ (laptop)
– Main and Aux / Bluetooth