Troubleshooting No Signal Issues After PSU Upgrade

Upgrading your power supply unit (PSU) can significantly enhance your PC’s performance, but what happens when a new PSU leads to no display? After swapping out my previous Cooler Master 650W for the more robust Corsair SF 850W, I encountered an unexpected issue: my monitor displayed a “no signal” message upon powering up.

The Situation

After meticulously installing the new PSU and reconnecting all relevant cables, including the DisplayPort cable to my graphics card, I eagerly powered on my PC. However, to my dismay, the screen remained blank. I also attempted to use the HDMI output on the motherboard, but that too yielded no results.

My Setup Specs

For context, here are the specifications of my current setup:
– Case: Fractal Terra
– CPU: AMD Ryzen 5 7600
– Motherboard: ASUS ROG STRIX B650E-I GAMING WI-FI
– GPU: Gigabyte GeForce RTX 4060 Windforce OC 8GB
– RAM: Kingston Fury Beast DDR5 5600MHz (2x16GB)
– Previous Power Supply: Cooler Master V Series V650 SFX
– Storage: KINGSTON NV2 2000GB M.2 2280 NVMe
– Cooling: Noctua NH-L9i Chromax Low Profile AM5

Seeking Solutions

If you’ve encountered a similar scenario or have expertise in troubleshooting hardware, your insights would be invaluable. Here are a few thoughts I have, and I welcome any additional suggestions:

Check Connections: Have I overlooked securing any cables? It’s crucial to ensure that all connections to the motherboard and GPU are firm and properly seated.
Power On Self Test (POST): Could it be that the system isn’t completing POST? Observing any motherboard lights or error codes might provide helpful diagnostic information.
Compatibility and Initialization: Is there a possibility that the new PSU is causing an initialization failure with the GPU or motherboard?
Testing with Minimal Configuration: Should I try booting with minimal components to isolate the issue—perhaps booting with just the CPU and RAM, and then adding components back one by one?
Reset CMOS: Would resetting the CMOS help in reinitializing the motherboard settings?