One day my LG dryer would not stop running even after the cycle was over. No matter what buttons I pushed the dryer would continue to run. So I determined the problem was with the main board and decided to replace it. Follow along and I will show you the replacement steps.
Here's a link to the replacement board - https://amzn.to/3vMrRwt
Unfortunately the board has been discontinued so you will have to take a chance on Ebay.