19Detector can notfind the laser1. It detects a red laser line2. The detector is out of itsworking range3. Low voltage of the battery1. This detector can only detectgreen laser.2. Make sure the distancebetween tool and detector doesnot exceed 200 feet.3. Change with a new batteryThe remotecontrol can notoperate the tool1. The tool is shut off wholly2. Low voltage of the battery3. The remote control is out ofits working range1. Press the power button on thetool first, and then use the remotecontrol to operate it.2. Change with a new battery3. Make sure the distancebetween tool and remote controldoes not exceed 100 feet.AC/DC adaptercan not provideelectricity for therotary laser1. Weak connection of theplugs2. The mains supply is powercut1. Make sure the AC/DC adapteris connected well with the tooland the socket of mains supply.2. Operate the tool with batteries.