SiliconMage

After all the connections have been completed, power on the computer.
Press del while the computer is booting to enter the BIOS and check all the basic BIOS entries to ensure that all the settings are correct.
Depending on your system configuration, you may want to enable or disable various settings - the motherboard manual may have reccommendations for this.

If there is no problem at the BIOS level, the CPU will search for an Operating System installed on your HDD. For a brand new HDD, if you are installing Windows XP
Insert the Windows XP installation CD in the CD ROM drive and reboot.
Press del again to enter the computer BIOS settings to set CD Rom drive as the first boot-up device.
Reboot your computer to start the Operating System install.
Once Windows XP is completely installed, the other additional hardware like modems, network card, sound card can also be installed.

Assembling a computer at home involves the following steps:

STEP 1:
Install your motherboard on the casing first. Put plastic stands-off under motherboard. Place in position in casing and install all screws required.

STEP 2:
Mount the CPU on the motherboard - being careful to position as required, as the fine pins are quite soft. This may take some time. Install the Cooler Fan Heat Sink assembly. Apply the paste which adds adhesion and contributes to the cooling effect on the top of CPU before clipping on the fan.

STEP 3:
Install the RAM module. To allow for easy insertion of RAM, push the white levers on both sides down. The gap in the RAM module should be matched to the slot. Push down the RAM firmly and pull the levers back up. They will click into position.

Any new motherboard should come with a diagram of the RAM layout. If there are empty slots a single ram module must be installed in the proper order.

STEP 4:
After the RAM is installed, the graphic card should be installed. It is usually next to the RAM slots and the may have to be pulled out if  the RAM was installed later .

STEP 5:
Install all the drives - the DVDRom, Floppy Disc Drive and HDD.

STEP 6:
Wiring up. Fit all your drives data cabling for the HDD, floppy disk drive (if needed) and DVDRom drive. These cables carry data signals between  hardware and the motherboard. They should be installed with their red edge facing the power supply plug.

For most motherboards, the primary slot is assigned to the HDD, the secondary slot will support an additional HDD/DVD Rom drive and the third slot will support the floppy drive.

STEP 7:
Connect up the mouse, keyboard and monitor.

LAST STEP:
As a last step, connect up all power plugs to the motherboard and drives. The main power source from the power box should be connected first.

For assembling your own computer, you need to buy the essential components that are needed for a function computer. These include the latest version of

1. CPU with Cooler Fan.
2. Compatible Motherboard
3. Ram module
4. HDD - with IDE cable
5. DVDRom Burner/Drive
6. Floppy Disc Drive - with cable
7. Graphic Card
8. Computer Casing with Power Supply box.
9. Modem
10. Sound Card
11. Network card (optional)

If you wish the Monitor, Keyboard and mouse can be salvaged from your “old” working computer system. Monitors are usually expensive and take up a lot of space, so it is better to use the old monitor. The keyboard and mouse get worn out quickly, so getting new parts is better

Hardware accessories include screws, plastic stands off ( to lift the motherboard off the enclosure), Plastic Ties.

Some computer manufacturers allow buyers to order custom built computers where they can specify the amount of RAM / hard disk space,  but there is a limited amount of  flexibility. The best custom made computers are those which are assembled by the end user or by a  reliable computer assembler who knows the applications which will be run on the computer and selects the hardware accordingly.

Requirements for assembling a custom built computer :

1. Intermediate to advanced knowledge of  computer hardware and assembly. You should not only be able to read and understand component specifications and assembly instructions, but also be able to fit components together and ensure that there are no loose connections.  If you are not proficient, it is advisable to hire the services of  a computer technician for a few hours.

2. Tools :   Magnifying glass,  small flashlight , a set of  Philips screwdrivers for assembly and needle nose pliers. An anti static wrist strap is also recommended to prevent damage to components.

About custom built computers and assembly of computers