Why won't PS4 Pro won't boot after thermal paste replacement?

Hi all,

I was a phone repair man and current engineer so I’ve worked lightly with this stuff before. My friend and I took apart his PS4 Pro and replaced the thermal paste. When we went to turn it back on, it worked, and went to the netflix screen and then it just shut off.

Now, it will no longer boot. It’ll beep once, have the blue light come on on the front, then power off. Taking the lid off and doing this I see the fan doesn’t even spin during bootup or anything.

I took it apart again, applied thermal paste again, put all of the screws back and made sure that each cable was seated and still nothing.

I did not blow the copious amounts of dust out, so I’ll try that later today, as well as picking up higher quality paste at staples as I ran out. I’ve seen reports of people turning it upside down and giving the PS4 PRO a hard smack and this working which I’ll also try.

Any other thoughts?