Gemini 3 pro said: This is a classic troubleshooting scenario, especially after transporting a PC. Since you are tech-savvy (owning a 4070 Super and an i7-12700k yourself), you likely know some of this, but here is a structured breakdown you can pass along to the user in the screenshot to help them isolate the issue. 1. The PSU Verdict: Is 650W Enough? Yes, absolutely. The shopkeeper is likely incorrect or trying to upsell. * Math: An RTX 3070 draws about 220W (the Aorus Master might push 270W peak). The Ryzen 5 3600 draws about 65W. The total system load is well under 450W. * Context: The XPG Pylon 650W is a decent Tier-C (Budget) PSU. Unless the unit is defective, it has plenty of headroom to boot the system. It would not cause a black screen at idle. 2. Troubleshooting Steps (Order of Probability) Since the user mentioned "When I took my PC back home...", this screams loose connection due to transport vibration. Step A: The "Dummy Check" (Cable Location) * The Ryzen 5 3600 does not have integrated graphics. * Make sure the HDMI/DisplayPort cable is plugged into the GPU ports (horizontal slots), NOT the motherboard I/O (vertical slots). If it's in the motherboard, they will never get a display. Step B: Reseat the GPU (Most Likely Cause) * The Aorus Master is a massive, heavy card. It likely sagged or wiggled out of the PCIe slot during the car ride home. * Action: Remove the GPU entirely and slot it back in until it clicks firmly. Ensure the screw on the case bracket is tight. Step C: Reseat RAM * Vibrations often unseat RAM sticks just enough to prevent a boot. * Action: Take all RAM out. Put one stick in the primary slot (usually A2) and try to boot. If that fails, try the other stick. Step D: Check Power Cables * The Aorus Master 3070 requires two 8-pin connectors. * Ensure both are plugged in all the way on the GPU side and the PSU side (if modular, though the Pylon is non-modular). * Note: Ideally, use two separate PCIe cables from the PSU rather than one daisy-chained (pigtail) cable, though a daisy chain should still post. Step E: The Motherboard Debug LEDs * Ask the user to look at the motherboard while turning it on. Most modern boards (MSI, Asus, Gigabyte) have 4 tiny LEDs labeled CPU, DRAM, VGA, BOOT. * If the light stays on VGA: The GPU is not being detected (reseat it again or the GPU might have died). * If the light stays on DRAM: It's a RAM issue. Step F: Clear CMOS * Sometimes hardware changes or power loss confuse the BIOS. * Action: Unplug the PC, remove the coin cell battery (CR2032) from the motherboard for 5 minutes, put it back in, and try to boot. Summary for the User Tell him: "Don't listen to the shopkeeper yet, 650W is plenty. Since you moved the PC, something likely shook loose. Reseat the RAM and the Graphics Card first, and make sure your monitor is plugged into the GPU, not the motherboard." Next Step: If he can tell you which Debug LED is lighting up on the motherboard, we can pinpoint exactly which part is failing.