Monitor Screen Goes Black, Sound Continues Playing for a Few Seconds then Loops Indefnitely

[ftaylorr1997]

Hi there.
I recently built a brand new pc and have been encountering this issue since day 1.
As the titled states, my monitors screen goes black and any sound that was playing continuously plays for a few seconds before it goes into a glitchy loop indefinitely. Only way out of it is to turn it off at the case.
I havent received any form of error messages from it unfortunately, although i once heard Windows pop-up noise when it black-screened.
The crash itself has happened when gaming (playing Papers, Please), watching videos on YouTube and once or twice when idling.
Have attempted a number of different troubleshoots so far:
- Reinstalled Windows (according to Microsoft, it was a compatibility issue with PSU (???))
- Checked power cables to all components several times, including making sure they are all plugged in.
- Stress tested GPU and CPU and it never crashed - Recently installed a new fan to improve airflow although it made no difference.
- Monitored temps of CPU and GPU and they never went that hot at any point
- Also underclocked GPU as someone suggested it, made no difference
The only form of error message i have received is from me shutting the computer down at the case, message is along the lines of:
System
Provider
[ Name] Microsoft-Windows-Kernel-Power [ Guid] {331C3B3A-2005-44C2-AC5E-77220C37D6B4}
EventID 41
Version 3
Level 1
Task 63
Opcode 0
Keywords 0x8000400000000002
Really at a loss at this point, PC is now borderline unusable and im really needing it for upcoming exams.
Any help would be very appreciated.
The build:
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor (£143.99 @ Novatech)
Motherboard: ASRock B85M Pro4 Micro ATX LGA1150 Motherboard (£52.99 @ Amazon UK)
Memory: Crucial Ballistix Sport XT 8GB (2 x 4GB) DDR3-1866 Memory (£35.67 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£39.08 @ Amazon UK)
Video Card: XFX Radeon R9 380 4GB Double Dissipation Video Card (£149.99 @ Novatech)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case (£35.93 @ Aria PC)
Power Supply: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply (£57.18 @ Amazon UK)
Operating System: Microsoft Windows 10 Home OEM (64-bit)
Wireless Network Adapter: Gigabyte GC-WB867D-I 802.11a/b/g/n/ac PCI-Express x1 Wi-Fi Adapter (£28.50 @ Amazon UK)
Total: £543.33
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-21 18:37 GMT+0000

 

[Lutfij]

Are you sure your BIOS and remaining device drivers are up to date? Try uninstalling your GPU drivers using display driver uninstaller and then reinstall using the latest drivers from AMD. Make sure your ram is running at 1600MHz within your BIOS.

Are you connected to the internet with both the LAN port and the wireless card?

Have you ruled out your installer being corrupted by recreating your bootable USB installer? Is your option for automatic device driver updates disabled? For added measure did you follow up with this guide while building your PC?