RAM suddenly stop booting at 3200

[TOPET3]

Hi everyone! I have an odd problem: My ram was working fine at 3200MHz until someday I plug off the PC to clean a little, and when I try to switch on again, it stops posting unless it gets to default memory speed.

It was working fine at 3200 for about 2 months... Nothing change, i checked uefi multiple times, battery is good, put it to 1.40V, even flash with last bios again 3.10. And not a single OC value post now, only default 2133 

My specs: Ryzen 5 1600, asrock ab350m pro4 v3.10, 2 sticks 4gb G.SKILL Trident Z ( F4-3200C16D-8GTZB ).

Maybe my old power supply has something to do?? idk what to do, it was working fine until I plug it off