usb ports not working

Was the console dropped? Have you tried both USB ports?

Most common issue here is that the cable being used is charge only. I've also seen a data cable that did not allow for sync. If possible, try and solve for wrong/bad cable first. Assuming controller and cable are good...

While the PS4 is off, hold the power button until you hear it beep a 2nd time (about 7 seconds). This will take you into safe mode. It will ask you to connect the controller via cable. If it works here, but not on the home screen, your wifi module is bad. If it doesn't connect here also, then your southbridge is likely bad.

If you do have to get down to board level, you can also check to see if the overvoltage regulators on the USB ports are good. Sometimes it can be that the USB port is bad and not the associated chips (not common).