Losing Signal to Monitor into failing to boot, is this a Graphics Card or a PSU problem?

Nov 3, 2018
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A few months back I started having problems with my computer where the monitor would randomly go into power saving mode (losing signal) and then I'd have to restart my computer to get it working again. Eventually this progressed into my computer not giving signal on boot at all.

After guessing it was most likely related to the motherboard/ram/cpu i upgraded those parts, and the computer worked fine for about a month, before doing the same thing again.

Taking the graphics card (XFX R9 290x) out and using the cpu graphics works fine but if the card is plugged into the power supply it doesn't work. Although yesterday I tried again and things worked fine for a bit before going back to giving no signal and seemingly failing to boot.

Is this confirmation that it's a graphics card problem or could the PSU be involved? If it is my GPU can I repair it somehow?
 
Nov 3, 2018
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Time of this report: 11/7/2018, 11:05:02
Machine name: DESKTOP-NAKBM46
Machine Id: {FD8B1F39-DAA1-4F07-AD93-2CB26FD04CAE}
Operating System: Windows 10 Pro 64-bit (10.0, Build 17134) (17134.rs4_release.180410-1804)
Language: English (Regional Setting: English)
System Manufacturer: Micro-Star International Co., Ltd.
System Model: MS-7B47
BIOS: 1.10 (type: UEFI)
Processor: Intel(R) Core(TM) i5-8600K CPU @ 3.60GHz (6 CPUs), ~3.6GHz
Memory: 16384MB RAM
Available OS Memory: 16300MB RAM
Page File: 10670MB used, 8060MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 12
DX Setup Parameters: Not found
User DPI Setting: 96 DPI (100 percent)
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Available, with HDCP
Microsoft Graphics Hybrid: Not Supported
DxDiag Version: 10.00.17134.0001 64bit Unicode

Motherboard is a Tomahawk z370
RAM is ADATA XPG GAMMIX D10 16GB (2 x 8GB)
 

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