How Many Types Motherboard faults

motherboard faults 

motherboard Are very crucial parts of the computer . Because all the parts seem to computers. They all are somehow connected to the motherboard. If this does not work for the motherboard, the computer you can not do any work.
What are the departments in the motherboard. And they would work. And what happens when they do not work. And to fix it. They will tell you.

If the motherboard does work. There are so many electronics component attached to the motherboard, such as
Resistor, capacitor, coil, ic, bga chip, and multiple slots
Mother board is engaged primarily in the CHIP and the controller are given below

NORTH BRIDGE
SOUTH BRIDGE
I/O CHIP
CLOCK IC
KEY BOARD MOUSE CONTROLLER
USB CONTROLLER
CLOCK GENERATOR IC
RESET
BIOS
CMOS
TRIGGER SECTION
VRM SECTION
VRM IC
 AUDIO CONTROLLER
LAN CONTROLLER
RAM POWER SECTION
RAM CONTROLLER
PCI SLOT CONTROLLER

MOTHER BOARD : NO DISPLAY,RAM POWER PROBLEM,RAM DETECTION PROBLE,IDE/SATA CONNECTIVITY PROBLEM,SYSTEM RESTART PROBLEM, CPU OVER HEAT PROBLEM, HANGING PROBLEM ,LAN PROBLEM,SOUND PROBLEM,USB NOT WORK Etc. This is all wrong Mother.
So how do which sections of the motherboard. Should know.
Let's start with the first power section.
(VRM) from SMPS power section work by the SUPPLY HIGH FREQUENCY by boosting the CPU's core voltage to provide the amenities.
VRM section MOSFET, COIL and VRM IC are given by the CPU Core Voltage.

See  MOTHERBOARD POWER SECTION CIRCUIT