Unraveling the Blank Screen Issue in Newly Built High-Performance PCs


I recently assembled a new computer with the following components: an Asus A620M-A motherboard, an RTX 4070 GPU, a 7700X CPU, 32GB of DDR5 5200MHz RAM, a 750-watt PSU, and a 1TB NVMe SSD.

Upon powering up the system, I encountered an issue where the display remains inactive. I’ve attempted troubleshooting by removing the GPU and RAM, but the problem persists.

Interestingly, after performing a BIOS flashback, the display briefly functioned, leading me to believe the issue was resolved. However, after reassembling everything inside the case, the display ceased to function once more. I’ve double-checked all connections, which appear to be secure.

Could you provide any insights or suggestions to resolve this display issue? Your assistance is greatly appreciated.”


Building a new PC can be an exciting venture, but it can quickly turn into a troubleshooting challenge when things don’t go as planned. In your case, the absence of a display output after assembling a new system with an Asus A620M-A motherboard, RTX 4070 GPU, 7700X CPU, 32GB DDR5 RAM, 750-watt PSU, and a 1TB NVMe SSD is indeed perplexing, especially after a successful BIOS flashback seemed to temporarily resolve the issue.


Power and Post:

Ensure that the system is powering on with all fans spinning, including the GPU fan. Check for any POST (Power-On Self-Test) beeps or LED indicators that can provide error codes.


Monitor and Cable Check:

Confirm that the monitor is functioning correctly by connecting it to another device. Also, try different cables to rule out any issues with the display cable.

BIOS/UEFI Settings:


BIOS Reset:

Since the display came back after a BIOS flashback, it’s possible that a setting in the BIOS is causing the issue. Clear the CMOS to reset the BIOS settings to default.


Primary Display Output:

In the BIOS, look for settings related to primary display output and ensure it’s set to the correct device (i.e., your GPU if you’re using one).

Hardware Troubleshooting:


RAM Check:

Reseat the RAM sticks, ensuring they click into place. If possible, test with a single stick of RAM and alternate slots.


GPU Seating:

Ensure the GPU is properly seated in the PCIe slot. If you have another PCIe slot, try reseating the GPU there.


Power Connections:

Double-check all power connections, especially the 8-pin or 6-pin connectors on the GPU and the 24-pin motherboard power connector.

Advanced Troubleshooting:


Motherboard Standoffs:

Ensure that the motherboard is installed with standoffs to prevent shorts against the case.


Peripheral Devices:

Disconnect all non-essential peripherals to rule out any conflicts.


Speaker for Beep Codes:

If your motherboard has a speaker header, connect a speaker to listen for beep codes during POST.

When to Seek Professional Help:

If after all these steps the issue persists, it might be time to consider professional help. A local PC repair shop or the support for your motherboard could provide further assistance. It’s also possible that a component might be defective and require replacement.

Remember, patience is key when troubleshooting. Methodically work through each potential issue, and you’ll likely find the solution. Good luck!

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