New Built PC, works fine at first. Suddenly shut down during gaming, monitor cannot receive HDMI signal afterwards.

Junwei_1

Prominent
May 18, 2017
1
0
510
This is my built:
CPU: Intel - Core i5-7600K 3.8GHz Quad-Core Processor
CPU Cooler: CRYORIG - H7 49.0 CFM CPU Cooler
Motherboard: Asus - PRIME Z270-A ATX LGA1151 Motherboard
Memory: Kingston - HyperX Fury Black 8GB (2 x 4GB) DDR4-2133 Memory
Storage: Samsung - 850 EVO-Series 250GB 2.5" Solid State Drive
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Gigabyte - Radeon RX 580 8GB Gaming 8G Video Card
Case: NZXT - S340 (White) ATX Mid Tower Case
Power Supply: EVGA - SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply
Wireless Network Adapter: Asus - PCE-AC56 PCI-Express x1 802.11a/b/g/n/ac Wi-Fi Adapter
Monitor Dell 27 monitor: S2718HX

Just built my pc yesterday and everything was running fine at first, no problem at all. I then started to play Hero of the Storm, during the mid-game, my pc suddenly shut down and I couldn't turn it back on ever since. My PC still run when I turn it on, like LED still goes on and fan still spin, but my monitor just said it cannot receive HDMI signal. I used the Asus BIOS to overclocked my CPU, and I also noticed the fan is running really loud whenever I turn on the PC.

Please help! Your input will be greatly appreciated!