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Why doesn’t my computer boot?

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The inability of your computer to boot can be caused by various factors, ranging from hardware issues to software problems. To troubleshoot this issue effectively, follow these step-by-step instructions

Power On:

  • When you turn on your computer (either by pressing the power button or using a software command), the central processing unit (CPU) initializes.
  • At this point, there’s no program loaded into the main memory (RAM)

BIOS (Basic Input/Output System):

The BIOS is a firmware that is found on the motherboard that the CPU searches for.
The boot process is initiated by the BIOS.

POST (Power-On Self-Test):

POST is a BIOS function that tests all hardware components, including RAM, CPU, storage, and graphics card.
The boot process terminates if any problems are found during POST.

Loading MBR (Master Boot Record) to RAM:

The BIOS inserts the bootable device’s (HDD, SSD, or flash drive) MBR into RAM following POST.
Usually located at the beginning of the bootable disk, the MBR holds crucial boot information.

Bootloader Execution:

The bootloader is often the first instruction from the MBR that the BIOS executes.
The bootloader loads the operating system into RAM (e.g., GNU GRUB, LILO, rEFInd).

Operating System Initialization:

Once the OS is in memory, it begins its initialization process.

This includes loading device drivers, setting up libraries, and preparing for user interaction.

User Interaction:

Lastly, the operating system presents a graphical interface or login prompt, enabling users to communicate with the system.

“Remember that specific boot issues can vary based on hardware, software, and configuration. If your computer isn’t booting, consider checking power connections, hardware components, and any recent changes. If necessary, seek professional assistance for hardware-related problems. Happy troubleshooting”

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