Pc wont boot anymore? Only get a blackscreen with a white line

Troubleshooting a Non-Responsive PC: From Black Screen to BIOS Access Challenges

Experiencing hardware issues can be frustrating, especially when your system abruptly refuses to boot. If you’ve encountered a situation where your PC displays only a black screen with a white line or fails to access the BIOS, this guide will help you understand potential causes and solutions.

Scenario Overview

Recently, a user described a problem occurring during a gaming session. While interacting with friends on Discord, audio issues emerged—sound from both the game and other sources suddenly stopped. Attempting to restart the PC resulted in it failing to boot properly, with the system only showing a black screen topped with a white line. Worse still, even when attempting to access BIOS, the system would not respond, regardless of whether the GPU or CPU was used as the display input. The motherboard in question was only a week old, raising concerns about possible hardware failures.

Possible Causes and Diagnostic Steps

Temporary Hardware or Software Glitch
Sudden audio interruptions followed by boot failures can sometimes be attributed to software conflicts, driver issues, or short-term hardware glitches.
Graphics Card or Display Issues
A failing GPU or loose connections might cause display problems. Testing with integrated graphics or different monitors can help identify the source.
Motherboard or Power Supply Problems
A new motherboard failure or PSU issues could prevent successful booting or BIOS access.
Overheating or Power Surges
Hardware stress or power fluctuations can cause system instability.

Diagnostic Strategies

Perform a Basic Hardware Reset
Turn off the system, unplug power cables, and hold down the power button for 30 seconds to discharge residual power.
Reconnect and try booting again.
Check External Connections
Verify all monitor cables, power supplies, and peripheral connections are secure.
Use Minimal Boot Configuration
Disconnect non-essential hardware components.
Connect only the CPU, one RAM module, GPU (if applicable), and boot to see if BIOS becomes accessible.
Test with Different Display Outputs
Switch between integrated graphics (if available) and dedicated GPU.
Use different video cables and monitors.
Clear CMOS Settings
Reset BIOS settings by removing the CMOS battery for a few minutes or using the motherboard’s clear CMOS jumper.
Inspect Hardware for Damage
Visually examine the motherboard and components for physical damage