Controller charges but does not turn on

After i cleaned it with alcohol it didn’t turn on at all. It just charges. After a teardown i didn’t notice any physical damage. I think that the flexible pcb doesn’t make contact with the board. I also have the older dualshock 4 and they both failed at the same time. The old model doesn’t give any light when charging but the newer model all the ports work.

So the main thing is that they don’t turn on none of the buttons are working and there is no sign of liquid damage or other stuff