CompTIA A+ 220-1201Certification Prep

Laptop repairs are different because everything is packed into one portable chassis.

What makes a laptop unique?

• Combines display, keyboard, touchpad, ports, battery, and power supply into one device.
• Can run on AC power or battery.
• Uses familiar desktop operating systems such as Windows or Linux.
• Many components are smaller, harder to reach, and may require specialized tools.
• Some internal parts, such as RAM, SSDs, and Wi-Fi cards, may be upgradeable or replaceable.

Slow, organized disassembly prevents broken clips, stripped screws, and mystery leftovers.

• Use precision screwdrivers because laptop screws are tiny and easy to strip.
• Track different screw sizes because laptops often use different screws in different locations.
• Take photos as you go so you can reverse the process during reassembly.
• Track ribbon cables, connectors, and orientation before unplugging anything.
• Keep removed parts in antistatic bags and away from the work area.

• Laptop frames may be plastic or metal and cover all internal parts.
• Chassis pieces are often held by pressure tabs or tiny screws hidden under rubber covers.

Manufacturer service manuals are gold.

• Service manuals explain safe disassembly steps and clip locations.
• Do not start prying bezels with a screwdriver unless you know how that model opens.

Warranty warning:

• Attempting hardware upgrades might void the warranty.
• Only perform DIY repairs when no warranty option is available or you have been trained.

FRUs are parts that can be removed or upgraded without major repair work.

• Laptops have fewer FRUs than desktops, but many modern systems allow basic upgrades.
• It is best to buy replacement parts from the laptop manufacturer or approved vendor.

Common FRUs accessible through the back panel:

• RAM, often SODIMM modules.
• Fixed disks, such as SSDs or HDDs.
• Optical drives, when present.
• Wi-Fi cards or cellular adapters, such as Mini PCIe, M.2, or similar formats.
• These are often reached by removing a small screw plate on the laptop underside.

• Laptops use SODIMMs, which are smaller than desktop DIMMs.
• RAM slots are keyed, so incompatible standards such as DDR3 and DDR4 should not fit together.
• RAM usually pops out at about a 45-degree angle when the side catches are released.
• Some laptops expose one RAM slot, while others require removing the back cover or keyboard.

Common card formats:

• Mini PCIe, mSATA, and M.2.
• These formats are not interchangeable, so verify what the laptop supports.

These cards may offer:

• Wi-Fi, Bluetooth, or cellular LTE/GSM connectivity.

Antenna wires:

• Must be reconnected to the new adapter.
• Are delicate and routed around the laptop display bezel.

Cellular upgrades:

• If installing LTE/GSM hardware, remember the SIM card.

• Use OEM parts because most laptops require exact replacement parts.
• Some models require full disassembly, while others allow partial access.
• Always check the service manual before starting.
• Flat ribbon cables connect keyboards and touchpads to the motherboard.
• Ribbon cables may be held by locking latches that must be opened before unplugging.

After replacement:

• Use OS or device settings to configure keyboard region and touchpad sensitivity.

• Pry the keycap gently with a plastic spudger or flat plastic blade.
• The retainer clip is fragile and should be cleaned or handled carefully.
• Snap components back carefully and align the mechanism properly.

Fingerprint readers:

• Used for biometric logins such as Windows Hello.
• May be standalone or built into the keyboard or touchpad.
• Often connect to the motherboard by a flat ribbon cable.
• Are configured through vendor tools or operating system settings.

Camera and microphone:

• Often built into the display assembly and can be hard to replace.
• Camera wires run through the hinge and connect to the motherboard.
• The microphone is usually near the camera with a separate connector.
• Some users install privacy sliders or shields.

NFC scanner:

• Reads short-range NFC signals from keycards, badges, phones, or payment devices.
• Commonly used for secured-area access, employee badge authentication, and tap-to-pay mobile payments.
• May be integrated into the keyboard, touchpad, palm rest, or fingerprint-reader area.
• Needs a data connection to the motherboard and an antenna connection for reliable short-range reads.
• Usually configured through vendor utility software, access-control software, or operating system settings.

• Use proper tools and photo tracking to prevent mistakes.
• Follow service manuals for safe disassembly steps.
• Understand that compact laptop parts are harder to access than desktop parts.
• Know common FRUs: RAM, SSD, Wi-Fi cards, and some adapter cards.
• Track screws, cables, and antistatic protection.
• Use OEM parts for input device swaps and handle ribbon cables carefully.
• Match wireless card type, reconnect antennas, and insert SIM cards for LTE upgrades.
• Biometric, camera, microphone, and NFC components are often ribbon-connected and harder to access.
• Check warranty status before performing DIY repairs.