Before We Begin
You’re likely familiar with the basic parts to a desktop computer system or PC which are the monitor, keyboard, mouse, and a box these items plugin to. But what’s inside the box? And what should we call it? Some are told that box is the CPU. But the reality is the CPU is inside that box. Thus the box that everything plugs in to really is, and should be referred to as the PC or computer.
But what other things are inside your PC? Here is a short list, and these are the things we’ll be cleaning.
· Power Supply
· Motherboard
· Hard Drive
· DVD ROM drive
· 2 or more Fans
What You’ll Need
1. Medium Phillips head screwdriver or flat blade screwdriver
2. Vacuum Cleaner (optional)
3. Dust mask
4. Can of Compressed Air for cleaning such as Dust Off
Step One – Unplugging the Cables
Before unplugging any cables, make sure the computer has been properly shutdown, is completely off and unplugged from the AC outlet. Now, view the back side of your computer case. You see all those cables? This would be a good time to either take a clear picture of the back or make note of which connector that each of those cables are attached to. Now let’s remove the cables. All of them will simply pull out except for two. They are the monitor cable and network cable.
A word about Monitor Cables Monitor cables come in three main varieties. They are VGA, DVI, and HDMI. If yours is HDMI it will simply pull out. You can identify an HDMI cable because it has no thumb screws. Both VGA and DVI cable types will have two thumb screws securing the cable to the connector.
To remove, turn both screws counter clockwise until the connector freely comes off. If these screws are too tight to remove by hand, then a flat blade screwdriver should work. Words of caution though; when putting this connector back, only turn these screws until they are seated. DO NOT TIGHTEN them as this could lead to damage.
The network cable is like a large telephone cord. Simply squeeze the clip and the cord will come out with ease.
Once you have cables removed, find a comfortable flat surface to put your PC on. It’s a good idea do the cleaning outside with plenty if ventilation. However, your dining room table will do. Just be aware there will be airborne dust in case you have sensitivities. You may wish to put on the optional dust mask at this point.
Step Two – Removing the side panel
We’re now going to lay the computer on its side so that we have access to the top of the mother board when we take the cover off. To do this, set the computer upright so you have a clear view of the back of the case. Now slowly tip the computer to the left until it is safely flat on your work surface. We are now ready to remove screws.
Grab your screwdriver and look for two screws at the very end of the side panel. These may be Phillips head, flat head or thumb screws. (Some brands such as Dell are slightly different and may have a lever or buttons to open the case)
Once the screws are out, slide the panel toward you. It will move about half an inch and then stop. You can now lift the side panel off and set it in a safe place.
You should now see the motherboard, the power supply, and the cages which secure the hard drive and optical drive. You’ll also see one or more case fans. If instead, you see another metal panel and perhaps the bottom of the mother board, then put the panel back on and remove the other panel.
Step Three – Time to Clean
Compressed Air – Be sure read and follow the directions for using compressed air. You’ll need to keep the can upright to extremely cold liquid from coming out which can cause frostbite and damage to plastics. One helpful tip is to flex the nozzle in the general direction that you need airflow while keeping the can upright.
When using the vacuum avoid bringing anything on the motherboard into direct contact with the hose or attachments. We are mainly capturing airborne dust as it blown free by the compressed air.
Power Supply – The power supply is the large box with a fat bundle of cables coming out of one end. It has at least one fan, maybe two. Now look for slots or air vents in the power supply housing. This is where you’ll blow compressed air. A neat trick is to have the vacuum running near the fan while you blow compressed air into the vents. This will keep airborne dust to a minimum while you work. Look for residual dust which may cling to the edges of any vents.
CPU Cooler and Motherboard – On the mother board, look for a large metal block with fins and a fan fastened to the top of that. This is the CPU cooler. We’re going to clean this next. In order to keep the compressed air upright, you may wish turn the PC upright again. Aim the air in such a way as to clear the fins of the metal block of dust build up. There may be some residual dust on the fan which cannot be removed without taking it apart. This is normal and is all that can be expected from this procedure.
The Case Fan and Finishing up– Computer cases are designed to move warm air out and cool air in. Most cases have an exhaust fan. Some may have more than one. Look for any fans and clean them with air. If they are accessible, the fins may be wiped with a soft tissue. To finish up, inspect any drives, and the open areas in the chassis. You may find the vacuum helpful here. In most cases the drives will not be very dirty and a few short bursts of air should suffice. When reassembling your system, put the power cord on last.