Why is the washer Full of water but won't power on?

Use a shop vac to get the water out after the clothing is removed. These links should help:

How to Replace the Lid Switch Lock Assembly on Top Load Washer Repair... Washer Lid Switch Part Number 3949238 GUARANTEED FIT from Sears PartsDirect Kenmore 80 Series Washer Lid Switch Repair won drain or spin
Whirlpool washer stopped working full of water and clothes after opening...

The fill limit switch is not working

water fill valve have a particle of trash or deposit from water.replace water valve and problem solved.

You either have a blocked water pump or more likely a blocked diverter valve. Easy to fix if you are handy. Tip machine back on a 45 degree angle and let rest against the wall. It is a matter of disconnecting a coupe of clamps and twisting the pump counter clockwise.

Take a look at this document.

Gather towels, shop vac, mop....Open small door at the bottom of the washer on the outside. Remove the small door and cup that's attached to it. Be prepared for a washer full of water!!!!!! Reach in, turn the nob to the left so tht water and debris can escape. You need to do this every 5 loads to keep debris from building up and causing the door to lock.

What is the model number of your washer? This condition is caused by a bad lid switch.

Either one of your water valves isn't working properly, or the lines have sediment restricting the volume of water . What I would do is turn the water to the machine off and remove the water lines and make sure they aren't filled will calcium, etc. and look in the water valves where the hoses connect because that are, which has a screen, may be full of nastiness. If both those are good then the water valve solenoid(s) are stuck and won't open. The humming sound you hear lets you know the rest of the machine is working because the sound is generated by power being applied to the valve by the control.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

I know you don't want to hear this, but either you did something to the hose filter or you didn't get it plugged back in correctly.

If you banged the water inlet valve in moving it back, it might be damaged.

Suggest you unplug everything and start over.