Question 3yo system motherboard boots and flashes on for a second and then shuts down

Mar 1, 2019
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I've had this system for a few years and just a couple of days ago I tried to boot up my system and nothing happened, no lights no nothing. I check the cords and the PSU and retry it and and it comes to life for a second and then dies.Thinking it was the power supply I try the PSU in my roommates rig and nothing happens, so I try the paper clip test and the PSU fan starts. I have since tried putting my roommates components into my MoBo and the same thing happened when using either my PSU or my roommates. I'm thinking that both my psu and mobo may be shot but I'm looking to see if anyone else has any ideas before I shell out the cash for either.

RAM: Corsair dominator platinum 4X4 2800Hrz
MoBo: ASUS Rampage V edition 10
CPU: Don't quite remember some intel I7 I think
PSU: EVGA supernova 1000W G2
GPU: GTX1080ti