If the projector is mounted close to a fluorescent light source, try turning the fluorescent light off and using the remote. If the problem still exists, try controlling the projector with the front panel projector controls.
If you have a higher end projector that supports network connectivity; you have the option to setup Optoma Connect webpage for your projector to operate the projector. If you want to monitor or control one or more Optoma projectors or Optoma devices; you can setup Optoma Management System (OMS) and can schedule power on/power off accordingly as well as other supported features. For more information on OMS, see OMS articles.