u/HumanityIsAbove

This post contains content not supported on old Reddit. Click here to view the full post

Hi everyone,

I’m dealing with a persistent PC issue and I’m running out of ideas. I’m hoping someone here can help me diagnose it or point me in the right direction.

Specs:

• Case: Corsair 5000D Airflow
• Motherboard: ASUS Z690-A (DDR4)
• CPU: Intel i5-13600K
• GPU: RTX 4070 Ti (Gigabyte Aero 12GB)
• RAM: Corsair Vengeance 64GB DDR4
• Cooler: DeepCool AK620
• Storage: Samsung 980 Pro 500GB (M.2)
• Storage: Samsung 870 EVO 2TB
• PSU: Corsair RMx 850W

Problem:

The PC powers on normally (fans spinning, RGB working), but there is no display output.

• On startup, the CPU debug LED briefly turns on (red)
• The VGA white light remains on and shortly after the green BOOT light turns on and remains on
• The system stays powered on, but there is no display output
• Tested both GPU HDMI and motherboard HDMI outputs
• GPU completely removed > no change
• RAM tested in different slots (A2/B2) and with single sticks > no change
• CMOS battery removed and BIOS reset → no change
• All cables reseated and checked

The system does not reboot loop; it just stays on with no display and seems to fail POST.

What I have already ruled out:

• GPU failure (same issue even with GPU removed)
• RAM failure (tested multiple sticks and slots)
• Monitor/HDMI cable issues
• BIOS settings (CMOS reset performed)
• Loose connections

Question:

Based on these symptoms, I suspect either a motherboard failure or possibly a CPU memory controller issue.

Has anyone experienced similar behavior on a Z690 platform?

If it is the motherboard, what would be a good replacement option for an i5-13600K with DDR4 RAM?

I’m looking for something stable and reliable, not overkill, standard ATX form factor. Preferably a white coloured model.

If anybody can give any suggestion, I would really appreciate it 🙏.

Hi everyone,

I’m dealing with a persistent PC issue and I’m running out of ideas. I’m hoping someone here can help me diagnose it or point me in the right direction.

Specs:

• Case: Corsair 5000D Airflow
• Motherboard: ASUS Z690-A (DDR4)
• CPU: Intel i5-13600K
• GPU: RTX 4070 Ti (Gigabyte Aero 12GB)
• RAM: Corsair Vengeance 64GB DDR4
• Cooler: DeepCool AK620
• Storage: Samsung 980 Pro 500GB (M.2)
• Storage: Samsung 870 EVO 2TB
• PSU: Corsair RMx 850W

Problem:

The PC powers on normally (fans spinning, RGB working), but there is no display output.

• On startup, the CPU debug LED briefly turns on (red)
• The VGA white light remains on and shortly after the green BOOT light turns on and remains on
• The system stays powered on, but there is no display output
• Tested both GPU HDMI and motherboard HDMI outputs
• GPU completely removed > no change
• RAM tested in different slots (A2/B2) and with single sticks > no change
• CMOS battery removed and BIOS reset → no change
• All cables reseated and checked

The system does not reboot loop; it just stays on with no display and seems to fail POST.

What I have already ruled out:

• GPU failure (same issue even with GPU removed)
• RAM failure (tested multiple sticks and slots)
• Monitor/HDMI cable issues
• BIOS settings (CMOS reset performed)
• Loose connections

Question:

Based on these symptoms, I suspect either a motherboard failure or possibly a CPU memory controller issue.

Has anyone experienced similar behavior on a Z690 platform?

If it is the motherboard, what would be a good replacement option for an i5-13600K with DDR4 RAM?

I’m looking for something stable and reliable, not overkill, standard ATX form factor. Preferably a white coloured model.

If anybody can give any suggestion, I would really appreciate it 🙏.