No cold water, only hot

Here are some things to check that are general for all washers.
Is the cold water turned on? Are the hoses connected to the correct faucets? Is the filter screen inside the hose where it connects to the faucet clogged? Do you hear a buzzing sound when the washer is trying to fill and is set to COLD only?
If all the above are OK then the temperature selector switch (or electronic control) may have to be replaced.
If there is no buzzing sound when the washer is trying to fill on Cold only, the solenoid valve (that the hoses connect to on the washer) may have to be replaced.

The cold water inlet line is either clogged (it has a filter screen in it) or the cold-water solenoid valve is malfunctioning.

Remove cold water line, check for obstruction -- if no success, inspect electrical connections on solenoid valve (where the cold water line attaches to the back of the machine). If valve is getting current, take it apart and clean it. If that doesn't work, replace the solenoid valve.