TASK-2

on

 

Task 2: Disassembling and Assembling a PC

Objective

To disassemble and reassemble a personal computer and verify that it returns to working condition.

Apparatus / Tools Required

Procedure

A. Disassembly

  1. Shut down the PC, unplug power, and disconnect peripherals.

  2. Remove side panels of the case.

  3. Disconnect internal cables and label them if necessary.

  4. Remove expansion cards (GPU etc.).

  5. Remove storage devices (HDD/SSD).

  6. Release clips and remove RAM modules.

  7. Disconnect and remove CPU cooler.

  8. Unlock and carefully remove CPU.

  9. Unscrew and remove motherboard.

  10. Unscrew and remove power supply.

B. Reassembly

  1. Install power supply in the case and connect cables.

  2. Install motherboard and secure with screws.

  3. Insert CPU into socket, apply thermal paste, and mount CPU cooler.

  4. Insert RAM modules into slots.

  5. Install storage drives and connect data/power cables.

  6. Insert and secure expansion cards.

  7. Connect front panel connectors and case fans.

  8. Verify all connections, reattach side panels, and reconnect peripherals.

  9. Power on the PC and check for proper booting.

Result

The PC was successfully disassembled and reassembled, and it powered on correctly.

DONOT WRITE:

EXPLINATION:

Tools and Their Uses in PC Assembly/Disassembly

  1. Screwdrivers (Phillips head)

    • Use:

      • Used to tighten or loosen screws in the PC case, motherboard, power supply, and drives.

      • Essential for removing or securing expansion cards, storage drives, and side panels.

    • Why Phillips?

      • Most PC screws have a cross (“+”) shaped head, which requires a Phillips screwdriver.

  1. Anti-static wrist strap

    • Use:

      • Prevents Electrostatic Discharge (ESD), which can damage sensitive components like the CPU, RAM, and motherboard.

      • Worn on the wrist and grounded to the case or earth, it safely channels static electricity away from your body.

  1. Thermal paste

    • Use:

      • Applied between the CPU surface and the CPU cooler.

      • Improves heat transfer by filling microscopic gaps, ensuring efficient cooling.

      • Prevents overheating and improves system performance.

  1. Small containers for screws

    • Use:

      • Keeps screws, nuts, and small parts organized during disassembly.

      • Prevents losing important screws which are often tiny and varied in size.

      • Helps in quick reassembly.

  1. Personal Computer (PC)

    • Use:

      • The actual system that students will disassemble and reassemble.

      • Provides hands-on practice with internal components (motherboard, CPU, RAM, GPU, storage drives, PSU).

      • Helps students learn about hardware arrangement, connections, and troubleshooting.

        Disassembly — clear, step-by-step with tips & warnings

        Below I’ll explain each step you listed, what to do, how to do it safely, common pitfalls, and useful tips.

        1. Shut down the PC, unplug power, and disconnect peripherals

        • How: Use the OS “Shut down” option. When the system is off, unplug the mains cable from the PSU.

        • Extra safety: Press the power button once after unplugging (with power unplugged) to discharge residual capacitors.

        • Why: Prevents electric shock and avoids powering the board while you work. Remove all peripherals (monitor, keyboard, mouse, USB drives) so nothing tugs on cables while you open the case.

        2. Remove side panels of the case

        • How: Lay the case flat on its side (better access). Remove thumbscrews or Phillips screws on the rear edge of the panel — some cases have push latches or sliding tabs. Slide the panel off.

        • Tip: Put the screws straight into a small container; don’t leave them on the bench.

        • Why: Gives you access to internal components.

        3. Disconnect internal cables and label them if necessary

        • What to disconnect: 24-pin ATX main power, 4/8-pin CPU power (EPS), PCIe power to GPU, SATA power/data, front-panel connectors (power switch, LEDs), fan headers, USB headers, audio header.

        • How: Press the latch/tab on the connector (if present) and pull the plug straight out — pull the plug, not the wires. For front-panel pins, note orientation or label them with tape.

        • Why: Prevents accidental damage when removing components. Labeling or photographing connectors speeds up reassembly.

        4. Remove expansion cards (GPU, sound card, etc.)

        • How:

          1. Remove the screw(s) securing the card bracket to the case.

          2. Locate the plastic retention clip at the end of the PCIe slot (if present) and press it to release.

          3. Grasp the card by its edges and pull straight out — support the card so it doesn’t drop.

        • Tips:

          • Heavy GPUs may be tight; don’t force — press the retention clip fully and wiggle gently while pulling straight back.

          • If the card has an additional latch or latch screw, remove those first.

        • Why: Expansion cards block access to other components and must be removed before the motherboard in many builds.

        5. Remove storage devices (HDD/SSD, M.2)

        • SATA HDD/2.5" SSD: Unscrew from their bays or unclip any tool-less tray, then disconnect SATA data and SATA power cables.

        • 3.5" trays/backplanes: Pull drive out of the tray after releasing tabs/clips.

        • M.2 NVMe: Unscrew the tiny M.2 retention screw and slide the module out at an angle. Keep the screw safe (it’s tiny!).

        • Tip: If drives are in hot-swap cages, pull the caddy out rather than unscrewing. Label cables if multiple drives exist.

        6. Release clips and remove RAM modules

        • How: Push the plastic clips at both ends of the RAM slot outward (away from the module). The RAM will pop up slightly — then pull the module straight out by its top edges.

        • Care: Hold the module by the edges, avoid touching the gold contacts or chips. Store in anti-static bag or a safe place.

        • Why: RAM slots are fragile; bending or forcing can damage the slot or module.

        7. Disconnect and remove CPU cooler

        • How:

          1. Disconnect the cooler fan(s) from the motherboard fan header(s).

          2. Release the cooler’s mounting — this can be screws (unscrew in a cross pattern), push-pins (twist/pull), or a latch/clamp.

          3. If the cooler is stuck due to old thermal paste, gently twist it left/right while lifting (don’t pry hard).

        • For AIO liquid coolers: Also disconnect pump/fan cables and remove radiator screws if you plan to remove the whole assembly.

        • Tip: Clean old thermal paste off the CPU/heatsink with isopropyl alcohol after removal.

        • Why: The cooler must come off before you can remove the CPU.

        8. Unlock and carefully remove CPU

        • How: Open the socket retention: lift the lever or open the socket cover (depending on socket type). Lift the CPU straight up out of the socket, holding by edges — do not bend or touch the contacts/pins.

        • Notes about pins: Some platforms have pins on the CPU, some have pins in the socket — either way, avoid touching those delicate areas.

        • Store safely: Put the CPU back in its original box or an anti-static container.

        • Why: CPU pins/pads are extremely delicate — a single bent pin can prevent boot.

        9. Unscrew and remove the motherboard

        • Prepare: Ensure every cable and expansion card is removed. Double-check front-panel connectors, fan headers, and any connectors on the board edges.

        • How: Remove all motherboard screws that secure it to the case standoffs. Use two hands to lift the board evenly and straight up.

        • Watch out for:

          • Hidden screws under drive cages, or extra screws near the I/O shield.

          • Standoffs left behind in the case that might fall out — keep track of them.

        • Tip: Keep the motherboard on an anti-static mat or its box once removed. Avoid placing it on bare metal or conductive surfaces.

        • Why: The motherboard is the heart of the PC; removing it frees up space to access the PSU and other parts.

        10. Unscrew and remove power supply

        • How: First, ensure every power cable is unplugged from components and motherboard. Unscrew the PSU mounting screws on the rear of the case (usually 4 screws), then slide the PSU out of its mounting position.

        • Modular PSUs: If modular, unplug modular cables from the PSU housing before removing.

        • Weight: PSUs can be heavy — support it with both hands while removing.

        • Tip: Keep the mains cable and any modular cables together to avoid losing them.

        • Why: Removing the PSU finishes the disassembly and lets you clean the case or replace components.

        General safety & organizational tips

        • ESD protection: Wear an anti-static wrist strap or frequently touch a grounded metal part of the case. Work on a non-carpeted surface.

        • Photos & notes: Photograph each step (wide and close shots) and note where each cable/connector goes — this makes reassembly far easier.

        • Screw organization: Use labeled small containers or a magnetic tray; group screws by component (motherboard, PSU, drives, fans).

        • Keep manuals handy: The motherboard and case manuals show standoff locations and special connectors.

        • Don’t force parts: If a component doesn’t come out easily, check for an overlooked screw, latch, or connector. Forcing can break clips or pins.

        • Cleaning: Use isopropyl alcohol (≥70%, better 90%+) and lint-free wipes to clean old thermal paste. Compressed air (short bursts) can remove dust.

        • Storage: Store delicate parts (CPU, RAM, GPU) in anti-static bags/boxes.

          PC Assembly Steps (Explained Clearly)

          1. Install power supply in the case and connect cables

          • How:

            • Place the Power Supply Unit (PSU) into its designated area in the case (usually bottom-rear or top-rear).

            • Align the screw holes on the PSU with the case bracket.

            • Secure it using 4 screws.

          • Cable connections:

            • Main 24-pin ATX power cable → motherboard.

            • 4/8-pin CPU power cable → near CPU socket.

            • PCIe power cables → GPU (later, if installed).

            • SATA/Molex power cables → storage drives, fans, etc.

          • Tip: Use cable management (route cables behind the case) for neatness and airflow.

          2. Install motherboard and secure with screws

          • How:

            • Place the I/O shield (metal plate with cutouts for ports) into the case first.

            • Position the motherboard inside the case, aligning its ports with the I/O shield and the screw holes with the case standoffs.

            • Screw it down firmly but do not overtighten (to avoid damaging the board).

          • Why: The motherboard is the central board connecting all components.

          3. Insert CPU into socket, apply thermal paste, and mount CPU cooler

          • How:

            • Open the CPU socket lever.

            • Align the CPU correctly (look for a triangle mark on one corner).

            • Place it gently into the socket, then close the lever.

            • Apply a pea-sized drop of thermal paste in the center of the CPU.

            • Mount the CPU cooler on top, securing it with screws or clips.

            • Connect the cooler fan cable to the CPU_FAN header on the motherboard.

          • Why: The thermal paste ensures proper heat transfer, preventing CPU overheating.

          4. Insert RAM modules into slots

          • How:

            • Open the retaining clips at both ends of the RAM slots.

            • Align the RAM module with the notch in the slot.

            • Press firmly until both clips snap into place.

          • Tip: For dual-channel setups, check the motherboard manual for correct slot usage (usually alternate slots).

          5. Install storage drives and connect data/power cables

          • How:

            • Mount HDDs/SSDs in their drive bays or brackets using screws/clips.

            • For M.2 NVMe SSDs, slide into the M.2 slot at an angle, then secure with a tiny screw.

            • Connect:

              • SATA data cable (to motherboard SATA ports).

              • SATA power cable (from PSU).

          • Why: These drives hold the operating system and files.

          6. Insert and secure expansion cards

          • How:

            • Remove the metal slot cover from the case.

            • Insert the expansion card (e.g., graphics card) into the PCIe slot.

            • Push firmly until it clicks into place.

            • Secure it with a screw at the back of the case.

            • Connect PCIe power cables (for GPU).

          • Tip: Handle the card by its edges, not the gold connectors.

          7. Connect front panel connectors and case fans

          • Front panel connectors:

            • Power switch, reset switch, HDD LED, and power LED → plug into the small pins on the motherboard (check the manual for correct layout).

          • Case fans:

            • Connect fans to FAN headers on the motherboard or to PSU fan connectors.

          • Why: Front panel allows you to power the PC on/off; fans ensure airflow.

          8. Verify all connections, reattach side panels, and reconnect peripherals

          • Checklist before closing case:

            • CPU power cable connected?

            • 24-pin ATX cable connected?

            • GPU power cables connected (if required)?

            • RAM firmly seated?

            • CPU cooler fan plugged in?

            • Storage drives connected (power + data)?

            • Front panel connectors plugged in?

          • Reattach the side panels and secure with screws.

          • Reconnect monitor, keyboard, mouse, and power cable.

          9. Power on the PC and check for proper booting

          • How:

            • Plug into power outlet, switch PSU on, and press the case power button.

            • Look for fans spinning, lights on the motherboard, and display output.

            • Enter BIOS/UEFI (usually by pressing DEL or F2) to verify that CPU, RAM, and storage drives are detected.

          • Why: Ensures that assembly is successful and components are working.

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