Question CPU is cold, no display, no readings on the keyboard or mouse

Jan 23, 2025
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Hello, I'm in a bit of a pickle at the moment and I need a little help, I just got a Lenovo Thinkcentre M900 motherboard.


When I plugged it in the wall I got no display, no keyboard or mouse reading, the USB's turn on, but the CPU is cold and the fan is really weak, the hard drive does get a little warm but hardly at all, I've tried getting a new PSU since my CPU is a Non-T processor thinking that the 90W PSU wasn't enough, but that didn't work, I tried hard resetting it, unplugging it, holding the button down only while the lights are on for a harder reset..... But nothing.


I know the CPU still works because the CPU paste was spread out on the thermal like it normally it should.
 
90w PSU? What is the make and model of the PSU?

Also, please list all the other installed components.
The PSU is a Lenovo 90W ADLX90NCC2A, 20V, 4.5A.

The motherboard has an NVMe on it, with dual channel 24GB of RAM.

(Edit: That's what I have connected currently)