No water pressure, dishes were dirty/not clean, no water to top rack

I removed both racks, the water feed tube, the lower spray arm, and round filter assembly. There's a small plate, cresent shaped, with 4 screws that you remove (it's a filter for large items, then a small round cover held with 2 screws that you take off and then it hinges open from left to right and comes off. There you will see the chopper blade assembly. Simply remove the old and place a new one in, ensure that the gears are engaged.

My old one was broken and clogged with debris and a small piece of cellophane, hence why the water would not circulate and I had no water pressure. It works like new now.

I would say that the repair is very easy, but it's awkward working inside the dishwasher. Remember to turn off the power to the dishwasher at the fuse/circuit box before you go poking around.

Good luck!