New M/B-CPU refuses to boot

[Colin Law]

On Mon, 1 Nov 2021 at 01:57, MR <mrzenwiz at gmail.com> wrote:
>
> On Mon, Nov 1, 2021 at 1:44 AM Little Girl <littlergirl at gmail.com> wrote:
>>
>> Hey there,
>>
>> :
>>
>>
>> After seeing this and your other messages in this thread, my money
>> wants to go on a failing power supply. Those can be quite brutal. I
>> know you just put a new motherboard, CPU, and RAM into the machine,
>> but how old is the rest of this computer? Also, are the fans inside
>> the computer running while all of these things are happening and/or
>> not happening?
>>
> Brand new power supply - I just replaced the old failing one about two weeks before buying this combo.  650w, so I don't think that's likely.
>
> Repeat: I am running on it now from the flash/install drive.  It's the SSD boot that's running so strangely.

Have you tried the memtest that I think someone suggested earlier?
Boot from usb if necessary and run the test for several hours.

Colin