I am not trying to simplify this, I am just saying it's a bad psu. I am a auto and truck diagnostics tech for 30 years now with 10 of those years performing auto and truck computer programing and diagnostics, and, the first step in troubleshooting a problem is to remove the part you installed when the problem started. this saves time and money. in my job I am graded on how efficiently I use the time I am allowed to figure out what is wrong with a car or truck I am performing the diagnostics on and this thread is wasting lots of time. I have to follow a labor guide and if it say's the diagnostics I am performing at the current time is to take me no longer then 6 hours then I must do it in 6 hours or less, every month my efficiency is totaled up and I am always 120% or higher in my efficiency.
bottom line is good customer service you should just say lets try another psu.
so stop wasting the customers time.