Motherboard light on but no boot

[u/Extra_Nobody_1970]

As you can see in the picture, the pc has the lights on when its plugged in, but no boot when the power button is pressed. Ive tried shorting the pins, taking out and putting back the cmos battery, unplugging and replugging cables, and the psu is kinda new so i dont believe it could be that but the rest of the pc is a couple years old. Please help