Back in the 90's I manufactured computer RAM so I know a bit about circuit boards, chips and other components. The attached photo appears to show a butchered job of removing a couple of resistors on the PC board. I can't imagine anyone doing that and expecting a good result. The internet, including YouTube, is full "how to's" that, if followed, would lead to terrible results. Trying to increase a drone's signal by removing components on it's main circuit board should go against the better judgement of most folks. Get a new board, install it carefully, and cut the plug off of your soldering iron to save yourself both grief and money in the future.