How to Troubleshoot & Replace Frigidaire AP3967975 / 134149220 Speed Controller Assembly

I removed the back cover and top cover of the washer. Checked all connections and motor belt. Consulted the wiring and troubleshooting guide sitting inside the machine. Followed the troubleshooting steps which included checking voltage and amperage to the motor and speed control board. After all the checks determined that the speed control board was at fault, I ordered a new board. Received the new board within a couple of days and installed. Worked immediately. No issues since. 

1. Searched for 'washer won't spin' then watched and read other people's experiences. 2. Opened the washer and read the tech document with schematics and troubleshooting steps. 3. Using my multimeter, diagnosed the problem, confirming the speed control board was malfunctioning. 4. Searched for local supply and found the part however it was much more expensive. 5. Found the part on AppliancePartsPros.com at the BEST price; ordered it. 6. Installed and tested - everything is working properly again! Yay me! Now to figure out what do I do with the faulty part... recycling? give it away to repair shop? 

While just normally using the machine, suddenly I hear a fzzzt sound, and smell burning circuits. Subsequently the agitator did not move at all, but all the other functionality did work, filling water, dumping in the soap, venting the water, etc. The machine did everything else right. So, it could have been the timer, the motor control board, or the motor. I guessed at the board, and I guessed right. After I had removed the old one, it was obvious that that was the problem, as there were burnt spots on the PC board, didn't see that before replacing it though. A good conclusion, it would have been a huge hassle and cost otherwise, instead of the $165.00 that AppliancePros charged.