Drum fills withe water when machine is not in use

There is usually a hatch at the back of the washing machine.

Make sure drum has no water in it

broken circuit in printed circuit board

is the belt ok?

indicated low water pressure from your external supply or blocked filters in the fill hose. turn water off, remove hose and check filter in end of hose - it is just a bit of gauze. also look into the valve and clean out if needed

1. Set the washing machine on the highest water level, temperature on hot and the wash cycle to normal.
2. Fill a gallon jug with hot tap water. Once the cycle begins, let it run for a minute or two, then stop the cycle, open the lid and slowly add the gallon of hot tap water. Don't overfill — you just want to raise the water level so that it is able to reach and clean the inside top rim.
3. Add 2 to 4 cups of household chlorine bleach and restart the cycle. In a couple of minutes, stop it again and just let it sit for at least 30 minutes. Afterward, let the cycle finish, and open the lid to air out the inside.

I got it from this link: http://answers.yahoo.com/question/index?qid=20060827101905AANuYg4
and here:
http://deseretnews.com/dn/view/0,1249,600124768,00.html

this is possible due to a bearing collapse or bearing spider broken. this causes drum pulley to be out of line and the belt comes off

check the drain hole when you start the machine if the water is coming back out , if yes that means your dump valve is bad.

check the lid switch

faulty fill valve. or tap not switched on correctly if it has the blue tap remove the top of the tap and use pliers to switch it on