These machines with the mode shifter are really hard to diagnose. Here is what the code 7 means.

"7 flashes - This code will prevent the motor from operating. This means that you washed clothes four times and the lid switch never opened. Since you can’t wash clothes four times without opening the lid there is a problem. This can be that the motor is flagging this error code for no apparent reason or the lid switch is bad. There are instructions on how to test the lid switch below and if it fails the test replace it. If however the lid switch is ok clear the code as described below and if it continues to flag this code replace the motor."

The first thing to do on these models is to reset it, then if that doesn't things check the lid switch and its wiring.

"To clear the error code, turn the washer off. Then disconnect power for about 20 seconds. Next, reconnect power then open and close the lid five or more times within 12 seconds in the first 30 seconds of power-up. "