Mother Board is the important part of the processing unit. It is only the Mother Board which controls all the commands of the computer. Hence it is also popularly known as the BRAIN of the computer. They are made up of sheet of fiber glass.All the components of the computer are either installed on it or connected using the connecting wires.For the inter connection of the components, thin copper lines are impregnated during manufacturing of motherboard. These copper lines are mounted with printed circuits. Hence they may also be verified as printed circuit board.
The following are the list of spare parts mounted on the mother board :
1. Extension Slots :
- Central Processing Unit (CPU) slot.
- DIMM SLots
- AGP Slot
- PCI Slots 1,2,3
- ISA Slots 1,2
- AT Power Connector 12 Pins.
- ATX Power Connector 20 Sockets.
- Keyboard Connector 5 pins (Female).
- PS/2 Mouse Connector 6 pins.
- LPT-1 Parallel Port Connector For Printer.
- COM-1,COM-2 Serial Port COMA and COMB 10 Pins for Mouse.
- FDD-1 Floppy Drive Connectors 34 pins.
- IDE-1 Primary IDE Connector 40 pins.
- IDE-2 Secondary IDE Connector 40 pins.
- Hard Disk LED 1 & 3 IDE activity Connector 4 pins.
- TB LED turbo LED Switch lead 2 pins.
- RESET Re-Set-Switch lead 2 pins.
- KEYLOCK/Power LED -Keyboard lock switch 5 pins.
- SPEAKER - Speaker Connector 4 pins.
- JIR - 1 - Infrared mobile connector.
- USB - 1 Usb Port Connector.
- CPU FAN, Cpu fan Connector.
- FAN - 1, Extra Fan Connector.
- POWER ON, Power On Button Connector.
- J - 5 Digital Audio Input/ Output Connector 4 [ins.
- J - 4 CD ROM Audio Connector 4 pins.
- J - 3 CD ROM Audio Connector 4 pins.
- WON - 1 WAKE on LAN Connector 3 Pins.
- J - 6 Audio Connector.
- JMS - 1 IRQ 12 Selector for PS/2 Mouse.
- J - 7 On Board Sound Enabled/ Disabled Connector.
- U8 Dip Switch for CPU Ratio Selection.
- JUBA - 1 COMS RAM (Normal or clear COMS Data) (Yellow Color selector).
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