Product review (5 stars): We replaced the drain pump that we KNEW was bad, then we experienced a door error
We have a LG WM0642HW Washer.  We replaced the drain pump that we KNEW was bad, then we experienced a door error.  Replaced the door lock assembly and the washer failed to recognize the door locked or unlocked at all.  After much research (and prayer!), we ordered the control board, hoping it would fix our problem.  Part was as described, fit our machine, worked AND fixed our problem.  Now we have our washer back! Installation easy, take a picture of old board and connections before you unplug everything and put the new one in.
Note that initial installation of the part yielded all lights lit and unresponsive.  Took time to closely examine the positioning of the new board.  Two more positioning attempts to get it right.  All buttons work.  Sounds are different than original board.  Much cheaper than calling a repair man and paying markup on the part.  Easy fix!  Hardest part was waiting for it to get here (arrived promptly as promised by seller)!