If you just purchased the boat, it's possible they never programmed that helm master settings. Look up the programming instructions for your year of helm master and make sure the trim assist has settings for the various RPM ranges. If not, best to take your boat out and note the trim at various speeds that you like and then program those RPM's/Trim settings into the helm master. I'm not certain that this is your issue, but it's a good guess based on when and how helm master tends to work. You get blinking green lights while it tries to engage something and if it can't, it just goes back to no light. That's why I'm (somewhat) guessing that there are no rpm settings for the trim assist. I have a 2021 and at that time, the printed instructions the dealer provided were wrong and didn't allow me to store the settings, but the onboard digital instructions from the yamaha screen were correct and worked for my year/model. Hope this helps - - setting up helm master can be a little tricky and people often get it wrong. Instructions are ok, but you need to follow them step by step. My servicing dealer also said almost 100% of helm master issues were related to incorrect setup.