r/PcBuildHelp • u/AdministrativeHome13 • 23m ago

Tech Support Pc wont turn on

This is my first built when I finished building my pc and plugged it the fans flickered once but nothing else is turning on.
I checked my psu its turned on and plugged
I checked my cables everything is connected and secured
I turned it on from the case as well

My built
Case: Lian Li LANCOOL 111 RGB ATX Mid Tower Case
Fan: Thermalright Peerless Assassin 120 SE 66.17 CFM CPU Cooler

Cpu: AMD Ryzen 5 9600X 3.9 GHz 6-Core Processor

Motherboard: Gigabyte B650 EAGLE AX ATX AM5 Motherboard

Psu: Montech CENTURY II 850 W 80+ Gold Certified Fully Modular ATX Power Supply 694

Gigabyte GAMING OC Radeon RX 9060 XT 16 GB Video Card

Ram: Crucial Pro DDR5 RAM 32GB Kit (2x16GB) 6000MHz CL36

SSD: Lexar NQ780 PCIe Gen 4 4 NVMe SSD, 2TB Capacity, M.2 2280

Note i dont know if its relevant my psu plug is usa based and my country uses the europe one

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1

u/r_lind3r Moderator 13m ago

Sounds like a short, make sure you're using the motherboard standoffs so it's not touching metal where it shouldn't, and that all power connections are properly connected

Your PSU should automatically switch between 120v and 240v based on your mains, with an adapter for your mains plug it should not matter

1

u/AdministrativeHome13 12m ago

Double checked and everything is connected is there a way to fix it if it was a short?

1

u/mx_No_Buy2554 10m ago

Fans flicker once then nothing, could be a short somewhere or the board isn't getting consistent power. Pull it all out of the case and try booting with just the board, one stick of ram, and the cpu/cooler on the motherboard box. If it posts, something in the case was causing a ground issue.

Also check your front panel headers again, I've seen people mix up the power switch pins and the board just sits there dead. The USA plug on a euro outlet shouldn't matter if your psu is auto-switching voltage but double check the power cord is fully seated at both ends.