Friend’s computer isn’t displaying anything after mobo cmos reset

Troubleshooting No Display After CMOS Reset on ASUS G15CS Gaming Laptop

Encountering display issues after performing a BIOS or CMOS reset can be a frustrating experience, especially when dealing with gaming laptops like the ASUS G15CS. In this article, we’ll explore the common causes of such problems, potential solutions, and best practices for remote troubleshooting.

Case Overview

A user reported that their ASUS G15CS failed to boot properly. To resolve the boot issue, they performed a CMOS (Complementary Metal-Oxide-Semiconductor) reset. While this action successfully restored the boot process, it resulted in the absence of display output from the dedicated GPU.

Initial Troubleshooting Steps

1. Removing and Reseating the GPU:
2. The user had to remove the graphics card to access the internal battery.

3. Upon reconnecting the GPU, it was ensured that it was securely seated.

4. Transition to Integrated Graphics:

5. The system appears to have reverted to using integrated graphics after the reset.

6. Using Alternative Display Methods:

7. A DisplayLink USB adapter was attempted as a workaround.
8. Despite waiting adequate time for Windows to initialize the adapter, no display output was observed.

Possible Causes

• BIOS Settings Reset:

• The CMOS reset may have reverted BIOS configurations, including graphics output priorities, to default settings.

• Hardware Seating and Connection:

• Even if the GPU was reseated, a loose connection or improper seating could prevent proper detection.

• Absence of External Display Outputs:

• The motherboard might lack specific display outputs for the dedicated GPU, relying instead on internal outputs or USB adapters.

• GPU or Motherboard Malfunction:

• Hardware failure or damage sustained during the reset process or handling.

Recommended Troubleshooting Approaches

1. BIOS Configuration Check:
2. Access BIOS settings during system startup.
3. Verify that primary display output is set to the PCIe GPU rather than integrated graphics.

4. Save changes and reboot to see if the GPU output is restored.

5. Hardware Inspection:

6. Ensure the GPU is firmly and properly connected.

7. Check for any visible damage or loose cables.

8. External Display Connection:

9. Connect an external monitor directly to the GPU’s display output port, if available.

10. Confirm that the monitor is set to the correct input source.

11. Driver and Windows Settings:

12. Boot into Safe Mode to see if any display output occurs.
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