As a new home owner, this was my first attempt at appliance repair, and it was a success! Washer stopped spinning and gave error code 59, "no signal to tach for 3 sec". Having no experience in appliance repair, I first googled and saw sometimes the drain can stop it from spinning, so I cleared out the trap. Didn't fix it, but definitely needed done! Finally solved the mystery of where the missing corner of my shorts went.
Next up I found the service manual online (which I subsequently found inside the washer when I removed the top) and performed 'Test 10' which signified that the speed control board needed replaced. I was nervous that wouldn't fix it since I read a story online of someone with a similar issue where it ended up being the main control board which was bad, but figured I should try the speed control board first, then try the main control if that didn't fix it. Luckily for me, I didn't have to go down that route as installing the new speed control board did the trick! Boy was I relieved that I didn't have to go to a laundromat this weekend!
As I mentioned, I have 0 experience in this and the process was relatively simple. The machine really isn't too complex, the only difficult part was maneuvering everything in tight spaces. A little frustrating at times, but well worth a working washer and a grand sense of accomplishment!