Hello all , I have a 8MP 4K DS2CE72UF3TE ColorVu POC Fixed Turret Camera 40M With Light TVI White with ds- 7204huhi-k1/p this is connected via a powerline adapter. When I first logged in I could see images , I then went into the ptz control and changed resolution of the cameras and saved changes, this then stop working . I have tried logging to the web interface but just blank images. Any help would be appreciated .