You have to unlock your meter panel to make changes to the power settings, after it is unlocked it has to be locked. If someone happened to unlock it to make changes I doubt they entered the same button sequence to re-lock it, therefore you should be able to make adjustments to the settings. What setting are you at now M,P,E, or H? H= high power, P= factory setting, E= economy, M=Manual. You can not change the power settings, unless it is unlocked, and you will need access to a service manual for the number sequence to unlock it if it is. Press 1 and 4 and see what it allows you to change.