Troubleshooting a Newly Built PC That Won’t Boot

Building a custom desktop PC is a rewarding experience, but it can also lead to frustration when issues arise unexpectedly. Recently, I encountered a problem with my rig that I hope to troubleshoot with the community’s help.

A Little Context

I completed the assembly of my desktop PC about two months ago. Initially, I faced only a minor setback with the XMP profile of my RAM, where the second profile proved to be unstable, forcing me to revert to the first. For the most part, everything functioned smoothly—until recently.

The Problem

While I was in the middle of a gaming session, I stepped away for a quick coffee break. Upon my return, I discovered that my monitor was completely black. The LED on the CPU indicator of the motherboard was lit, suggesting some form of power was getting through. When I attempted to restart the system using the case button, nothing happened. I then tried turning off the PSU (power supply unit) entirely. Unfortunately, after flipping it back on, the computer failed to start or show any signs of life—it felt as if there was no electrical current flowing.

Attempts to Resolve the Issue

To troubleshoot on my own, I tried several strategies:
– Changing the power outlet to ensure it wasn’t a power socket issue.
– Removing the RAM and GPU to isolate the problem, none of which had any visible effect.
– Checking all connections, which seemed secure and functional, as the system had been operational for two months without problems.

It’s worth noting that everything is under warranty. However, I’m unsure of what further steps I could take to diagnose the issue.

Current Build Specifications

Here are the specifications of my current setup:
– Processor: AMD Ryzen 5 5600X
– Motherboard: MSI B550M PRO-VDH
– Graphics Card: Gigabyte RX 7600 8GB
– RAM: 16GB (2x8GB 3200 MHz Kingston Fury Beast)
– Power Supply: MSI MAG A650BN 650W
– Storage: Kingston NV3 1TB NVMe
– Monitor: Keep Out XGM24V10

Next Steps

I have already contacted the retailer for support, and they are scheduled to pick up the PSU for warranty testing. If it turns out that the power supply is not the culprit, I would greatly appreciate any advice on other potential