I disconnected my SSD and HDD then my PSU died?
I was in the process of installing a new SSD into my PC so I removed the existing drives. I placed a new SSD into the slot where the old drives and connected it to a previously used SATA and power cable. Everything was completely routine as expected for a basic drive swap which I have done dozens if not hundreds of times before, except when I tried to turn the system on it was entirely dead.
Like, it didn't even POST. I re-seated all the power cables from the PSU to ensure nothing randomly came loose. The system didn't even start up when I pressed the power button built into the motherboard. The motherboard has one of those numerical displays to show error codes when booting up -- also dead. Its as if the system isn't even plugged in.
Finally I re-seated the thick power cord going to the power supply to make extra sure that nothing was loose, sadly that didn't miraculously fix the PC.
Everything points to the PSU being fried but I have no idea why. I have a Corsair AX860 and this system is so old it barely uses any power (Intel i7 core 4790k, GTX 1070ti, one SSD one HDD). This is the first time I've had a PSU break, but idk what I could ave done or what could have happened to cause it. Does anybody have any experience with this kind of issue, and/or know any way to definitely confirm the PSU is dead? Thank you