Question Computer turns on, monitor turns on, displays nothing, VGA light on mboard is on

Jan 16, 2020
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Hello everyone,

I recently built a PC that worked flawlessly for about 6 months, then suddenly stopped displaying anything when powered up (the monitor does turn on). The specs are:

MSI X470 GAMING PLUS AM4 AMD X470 SATA 6Gb/s USB 3.1 HDMI ATX AMD Motherboard

GIGABYTE GeForce GTX 1080 DirectX 12 GV-N1080TTOC-8GD 8GB 256-Bit GDDR5X PCI Express 3.0 x16 SLI Support ATX Turbo OC Video Card

EVGA SuperNOVA 750 G3, 220-G3-0750-X1 ECO Power Supply

Team T-Force Vulcan 16GB (2 x 8GB)

AMD Ryzen 7 2700x CPU


The VGA light on the motherboard was on, so the first thing I tried was reseating the GPU and power cables, but no dice. I have also tried:
a) moving the GPU into another PCI slot (x8 rather than x16): this did nothing
b) using a friend's old Nvidia GTX1050 in both the x16 slot and the x8 slot: it never worked in the x16 slot, worked the first time I tried it in the x8 slot, but hasn't worked since
c) using a different VGA slot in the PSU - also nothing.

My graphics card worked fine in my fiancee's computer. What are my next diagnosis steps? Is this likely to be a motherboard issue? Thanks!
 

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