Ps4 pro won't turn on after cleaning

I jus opened up my ps4 pro since it was showing that heat up issue while playing God of war
I opened it up cleaned it properly changed its thermal paste as well
Since I assembled it again it won’t turn on it does show blue light and it turns it self off right after
Wud appreciate any one who cud help me in this regard

Hi.

Check that HD is properly seated. Take it out, reseat it. Insert screw to lock it in position and try to boot again.

(Also this should be posted in pro section)