Hello all
After we energy on the pc to work, the method of checking parts on the mainboard will happen akin to checking Bios, checking Ram, checking HDD and different peripheral units. If the pc works usually, it’s going to enter home windows, in any other case, if there’s a defective gadget, it’s going to instantly report on the boot display akin to: keyboard error to report lacking keyboard, battery failure to report out of CMOS battery… So you might want to perceive and bear in mind the mainboard’s startup course of to establish injury and repair it rapidly and precisely.
After we click on on the facility change, energy on the pc, there would be the following boot course of.
The ATX supply works and gives the principle voltages for the mainboard together with 12V, 5V and 3v3.
The VRM circuit provides vcore energy to the cpu and can report the cpu’s vrm_good to the logic circuit (this circuit is often on the male chip).
The voltage regulator circuit of the south-north chipset, the ram voltage stabilizer circuit, the voltage stabilizer circuit of the AGP slot will work and likewise sign the circuit is sweet, not brief on the logic circuit just like the cpu’s vcore.
The logic circuit often built-in on the male chip will examine the ATX supply circuit, the cpu vcore circuit, the ram voltage regulator circuit, the chipset, the AGP slot. If all the above circuits are working fantastic, then the Logic circuit will generate a reset sign PGOOG for the pc to work.
The circuit generates a Clock pulse when there’s a PGOOD sign. And generate clocks for various units akin to CPU, Ram, Video Card… Every gadget has a special clock.
When there’s a clock + voltage, the male chip will work and conduct a PGOOD or PRW_OK circuit examine and generate a system Reset sign.
System reset sign will begin the mainboard parts together with: Chipset north, video card, slot pci, rom bios, ic sio. The CPU just isn’t energetic presently.
The North chip receives the system reset sign from the male chip and emits the CPU_RST sign for the cpu to work.
The CPU works and accesses the BIOS to load the bios program and makes use of the bios program to examine different parts on the mainboard.
Test the video card on the PCI categorical slot, AGP slot, examine the Ram and can report an error with a beep sound within the speaker if it detects an issue with ram and graphics card.
The CPU for loading the consumer’s bios settings (set the date and time, select besides by usb or CD…) is saved within the built-in cmos ram reminiscence within the male chip and is powered by a 3v3 cmos battery. If this battery is useless, it’s going to use the cmos default to check the gadget.
Test peripheral units: keyboard, mouse, onerous drive. Then boot the onerous drive and cargo the working system into the ram’s clipboard besides.
This booting course of takes place in a short time, often fixing pc {hardware} usually encounters an error in step 6 that the machine lacks a system reset sign. Attributable to one of many voltage stabilizer circuits is defective, due to the error of the clock ic or by the male chip itself, so the reset sign can’t be emitted. Want you guys happiness and success.
