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Disassembling and Assembling the Computer System

Updated on May 5, 2016
Computer System
Computer System | Source

Parts of Computer System

The computer system is made up of following external devices:

  • CPU Cabinet
  • Monitor
  • Keyboard
  • Mouse
  • Printer/scanner [if attached]

switch off the power supply and detach power cable
switch off the power supply and detach power cable | Source
remove the CPU cabinet cover
remove the CPU cabinet cover
detach internal cables
detach internal cables | Source
uninstall internal cards
uninstall internal cards
remove CD/DVD drives
remove CD/DVD drives | Source
remove Hard Disk Drive
remove Hard Disk Drive | Source
remove RAM
remove RAM | Source

Disassembling the computer system

Detach the power cable:

The disassembling of the computer system starts with externally connected device detachment. Make sure the computer system is turned off, if not then successfully shut down the system and then start detaching the external devices from the computer system. It includes removing the power cable from electricity switchboard, then remove the cable from SMPS (switch mode power supply) from the back of the CPU Cabinet. Do not start the disassembling without detaching the power cable from the computer system. Now remove the remaining external devices like keyboard, mouse, monitor, printer or scanner from the back of CPU cabinet.

Remove the Cover:

The standard way of removing tower cases used to be to undo the screws on the back of the case, slide the cover back about an inch and lift it off. The screwdrivers as per the type of screw are required to do the task.

Remove the adapter cards:

Make sure if the card has any cables or wires that might be attached and decide if it would be easier to remove them before or after you remove the card. Remove the screw if any, that holds the card in place. Grab the card by its edges, front and back, and gently rock it lengthwise to release it.

Remove the drives:

Removing drives is easier. There can be possibly three types of drives present in your computer system, Hard disk drive, CD/DVD/Blue-ray drives, floppy disk drives (almost absolute now a day). They usually have a power connector and a data cable attached from the device to a controller card or a connector on the motherboard. CD/DVD/Blue Ray drive may have an analog cable connected to the sound card for direct audio output.

The power may be attached using one of two connectors, a Molex connector or a Berg connector for the drive. The Molex connector may require to be wiggled slightly from side to side and apply gentle pressure outwards. The Berg connector may just pull out or it may have a small tab which has to be lifted with a screwdriver.

Now Pull data cables off from the drive as well as motherboard connector. The hard disk drive and CD/DVD drives have two types of data cables. IDE and SATA cables. The IDE cables need better care while being removed as it may cause the damage to drive connector pins. Gently wiggle the cable sideways and remove it. The SATA cables can be removed easily by pressing the tab and pulling the connector straight back.

Now remove the screws and slide the drive out the back of the bay.

Remove the memory module:

Memory modules are mounted on the motherboard as the chips that can be damaged by manual force if applied improperly. Be careful and handle the chip only by the edges. SIMMs and DIMMs are removed in a different way:

  • SIMM - gently push back the metal tabs while holding the SIMM chips in the socket. Tilt the SIMM chip away from the tabs until a 45% angle. It will now lift out of the socket. Put SIMM in a safe place.
  • DIMM- There are plastic tabs on the end of the DIMM sockets. Press the tabs down and away from the socket. The DIMM will lift slightly. Now grab it by the edges and place it safely. Do not let the chips get dust at all.

remove processor
remove processor
remove the motherboard
remove the motherboard | Source

Remove the power supply:

The power supply is attached into tower cabinet at the top back end of the tower. Make sure the power connector is detached from the switchboard. Start removing the power connector connected to motherboard including CPU fan power connector, cabinet fan, the front panel of cabinet power buttons and all the remaining drives if not detached yet.

Now remove the screws of SMPS from the back of the cabinet and the SMPS can be detached from the tower cabinet.

Remove the motherboard:

Before removing all the connectors from the motherboard, make sure u memorize the connectors for assembling the computer if required, as that may require connecting the connectors at its place. Remove the screws from the back of the motherboard and you will be able to detach it from the cabinet. Now remove the CPU fan from the motherboard. The heat sink will be visible now which can be removed by the pulling the tab upward. Finally, the processor is visible now, which can be removed by the plastic tab which can be pulled back one stretching it side way.

Assembling the computer system

The assembling of the computer system is exactly the opposite of disassembling operation. Before starting assembling the computer system, make sure you have the screws and a screwdriver for those.

The first step for assembling the computer system starts with mounting the processor on the processor socket of the motherboard. To mount the process, you don't need to apply any force. The special ZIF (zero insertion force) sockets are usually used to prevent any damage to the processor pins. Once the processor is mounted, the heat sink will be attached on top of the processor. The CPU fan is also attached on top of the heat sink.

Now the motherboard is to be fixed vertically in the tower case and the screws are fixed from behind of the motherboard.

Now line up the power supply at the top back end of the cabinet and screw it. The power connectors for motherboard power supply and CPU fan power supply are to be connected. If the cabinet cooling FAN is required then it is to be screwed at the back end grill of the cabinet and its power connector is to be connected from SMPS.

Install the CD/DVD drives at the top front end of the cabinet and screw it. Install the Hard disk drive and floppy disk drive below CD/DVD drive and screw it. Make sure once screwed there is no vibration in either of the CD/DVD, Hard disk or Floppy disk drives.

Now select the appropriate data cable and connect one end of the cable to its drive socket and another end at its appropriate connector on the motherboard. For SATA hard disk drive or CD/DVD drives use SATA cable and its power cable, else use IDE data cable. Do the proper jumper settings as per the usage requirement.

It is time now to mount the memory modules on the motherboard by aligning the RAM to its socket on the motherboard and press it downward. Make sure the side tab are fixed into the RAM notch. If not, you may still have to press a bit.

Install the internal cards to its socket and attach the cables or power cable to it. The selection of right socket or slot is required as per the type of socket.

Cover the tower by placing it and pressing towards front side and screw it.

Connect the external devices with CPU at its appropriate socket. It includes mouse and keyboard at PS2 or USB connectors. Monitor at the video output socket. Connect the power cable to the back of tower in SMPS. Plug in the power cable to the electric board.


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    • profile image

      Nate.l 4 days ago

      Great source to help with my research

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      javansinh parmar 5 days ago

      thanks for tips computer related

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      fernandez A 6 days ago

      thanks bro !!

    • profile image

      madhu mathi 12 days ago


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      Gurman 2 weeks ago

      Good information but I want information about assembly and disassemble of cpu

    • profile image

      abuzar khan 2 weeks ago

      its very usefull...thanks for givening good information

    • profile image

      kumar 3 weeks ago

      Really helpful

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      Jhayne 4 weeks ago

      It can really help.

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      BERNAD URASSA 5 weeks ago


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      jishnu jaban 6 weeks ago

      found it very useful

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      april cortex 6 weeks ago

      thank u for ur information about disassemble and assemble a computer

    • profile image

      joemar gumatay jr. 7 weeks ago

      thanks bro!.:)

    • profile image

      Dyna Paraliza 8 weeks ago

      ty very much for the information

    • profile image

      Aniket kulkarni 8 weeks ago

      Thanks men

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      thank u

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      thank you

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      thank you ;0

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      thank you :)

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      dona-chan 2 months ago

      thank you for the information .....

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      crystyl 2 months ago

      it really help students

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      cj 2 months ago

      finally i know how to assemble and dissasemble the system and unit of computer

    • profile image

      prudhvi 2 months ago

      i know that hardeware and software of a computer and knowing the parts of a computer

    • profile image

      kayya 2 months ago

      u have to explain clearly

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      janna 2 months ago

      this is corrrect?

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      pratyusha 3 months ago

      it's really superb

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      w4ey62 3 months ago

      the stepes follows to make assembling is it finished?

    • profile image

      PAUL KURT 3 months ago

      yeah right....

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      patchalalokesh 4 months ago

      good post

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      oppa 4 months ago

      nice/good job

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      kathy 4 months ago

      keep up the good work!

    • profile image

      "L" 4 months ago

      thank you for the information....

    • profile image

      nikki 5 months ago

      to me of all this is good because its have an idea or to promote about the ict ..and thats all we learning more about disassembling.

    • profile image

      frecyle rose baja 5 months ago

      nice, and thank u..

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      jonathan 5 months ago

      well thats good

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      nice it's very good

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      Poonam 7 months ago

      Nice information gathered all together

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      nunya 9 months ago

      this formation has been vary useful to me for a project i am doing in a work study.

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      cameron dalla 9 months ago

      sooo boring, make it more attractive to our eyes. Tss, you don't know the word style?

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      its really good...language is easy to understand..

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      Cesssss 9 months ago


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      Rhester Punkz Garcia 9 months ago

      thank you for posting this, I really appreciate your EFFORT♥♥♥♥♥♥♥♥

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      kabali 10 months ago

      it was very confusing

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      vasavi 10 months ago

      it is sooooooooo help full to all of the vasavi students

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      kian 11 months ago

      thanks for the information

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      mj 11 months ago

      hmmmmmm yeah it's not complete but it's ok....... it can help students like us who wants to know how to....... xD

    • profile image

      rapbeh 11 months ago


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      Bhanu 11 months ago

      Super explanation

    • profile image

      alex 12 months ago

      Nice work, this post helped me understand where to start and how to finish regarding assembling and disassembling a computer.

    • profile image

      guru 13 months ago

      More than enough information

    • profile image

      ME 13 months ago


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      silent 13 months ago

      its really nice and helpful

      thanks author...

    • profile image

      vaibhav kamble 14 months ago

      very awesome nd great for our project nd helpful also

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      this really can help for our project..........!

      thanks for this

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      dondon tomas 15 months ago

      very helpful.

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      Samantha 15 months ago

      Very Helpful.

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      annah 15 months ago

      cute process, like it

    • profile image

      ISAAC LUIS 16 months ago


    • profile image

      Jenny Rose Suelan 16 months ago

      Thank you so much... effort appreciated much!!

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      its so very nice topic. i like it

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      thankyou for posting it! its nice :)

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      jamby 17 months ago

      its nice thaks for posting

    • profile image

      sumanth 17 months ago

      digramatic explanation is not good

    • profile image

      Edison Muyala-MALAWI 18 months ago

      thank you so much for providing me with such useful has assited me alot in my program of study(bict),i believe i will excell.keep on doing that.

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      jauharah badru 18 months ago

      thanks for letting us knw coz now at least am perfect in assembling and diassembling a computer sys may God reward u abundantly

    • profile image

      Rosoldier 18 months ago

      I LOVE IT

    • profile image

      robert saigut 19 months ago

      good work

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      vanessa 20 months ago

      thank you for posting , it help me but the info is incomplete ..

    • profile image

      jk 21 months ago

      even the all answer is not complete I cannut answer

    • profile image

      aj 21 months ago

      even though its not complete, at least you shared your thoughts for students like me

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      Rj Galbo 22 months ago

      So COooooL !!

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      Hmmm .. Something Missing .. i think its not complete very well ..

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      Mani 23 months ago

      i like this post :)

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      Evana 2 years ago

      Its good and helpful but there is too much text reading

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      KRISHNA .P.SUTHAR 2 years ago


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      Jessel lumen 2 years ago

      Thank you for posting

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      thank you for posting

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      manikanta 2 years ago

      it is very helpful for all

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      paras joshi 2 years ago from rajkot, india

      you are welcome.

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      Aldrin 2 years ago

      it helps me to assemble and disassemble a system unit to my computer subject and it makes me good at assembling and disassembling a system unit

    • profile image

      anita 2 years ago

      This nice information and very helpfull of students

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      chandu 2 years ago

      it's good, thanks for posting it.

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      ysabel 2 years ago

      it's good it can help us in our ict subject.


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      hareesh 2 years ago


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      takiya 2 years ago

      let your points be brief and precise

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      renz lazaro 2 years ago

      your blogspot is missing something i think it's not complete...!

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      ariel calapis 3 years ago