The Black Screen and White Line Dilemma: Boot Issues Uncovered


“I’m encountering an issue where upon initial startup, my computer displays a black screen with a solitary white line near the top left corner. However, if I forcefully power off the system and then start it up again, it proceeds to boot correctly. Could this indicate a problem with my computer, and if so, what would be the appropriate solution? Additionally, my BIOS is the Asus UEFI version, if that’s relevant to the situation.”


Experiencing a black screen with a white line on your computer’s initial startup can be quite concerning. This issue, especially when followed by a successful boot after a forced shutdown, suggests that there might be a problem worth investigating. Given that your BIOS is the Asus UEFI version, there are specific troubleshooting steps we can consider.

Identifying the Problem

The black screen with a white line typically indicates a boot-up issue, which could stem from various factors ranging from hardware failures to software glitches. The fact that a second boot attempt is successful implies that the problem is intermittent, which can sometimes be more challenging to diagnose.

Possible Causes and Solutions


BIOS Configuration

: The Asus UEFI BIOS settings might be misconfigured, leading to boot issues.


: Access the BIOS setup by pressing the designated key during startup (often F2, Del, or Esc) and ensure that the boot order is correct, with the primary hard drive or SSD set as the first option.


Graphics Card or Monitor Connection

: A faulty connection with your graphics card or monitor could cause display issues.


: Check all cables and connections between your computer and monitor. If you have a dedicated graphics card, ensure it’s properly seated in its slot and that power connectors are secure.


Corrupted System Files

: System files crucial for booting might have become corrupted.


: Use Windows’ built-in System File Checker tool to repair any corrupted system files. You can run this tool by opening Command Prompt as an administrator and typing `sfc /scannow`.


Failing Hardware Components

: Components like RAM or hard drives can cause boot problems if they’re failing.


: Run hardware diagnostics tests available in the Asus UEFI BIOS under the ‘Tool’ tab, or use third-party software to check the health of your components.


Software Updates

: Outdated drivers or BIOS firmware can lead to compatibility issues.


: Ensure that all drivers, especially for your motherboard and graphics card, are up to date. Also, check the Asus website for any BIOS updates that might address this issue.

When to Seek Professional Help

If you’ve gone through these steps and the problem persists, it might be time to consult with a professional. There could be a more complex issue at play that requires expert diagnosis and repair.


A black screen with a white line on boot is not an uncommon issue, and in many cases, it can be resolved with some basic troubleshooting. However, if these steps do not resolve the problem, seeking professional assistance is advisable to prevent further damage or data loss.

Remember, it’s always a good idea to back up your data regularly to avoid losing important files in case of system failure. Good luck with your troubleshooting!

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