This chapter discusses other issues related to in-lab attended polysomnography. It also discusses troubleshoot common problems encountered during recording of polysomnography. Polysomnography equipment consists of a software and hardware. In this case, it becomes prudent that the hardware can support the platform that you are loading in the computer system to run other software. If any of these parts are incompatible, the system will not work properly. This should be taken care of by the sleep technologist at the time of purchasing the instrument. At times, the antivirus software of the computer system can also interfere with the functioning of the polysomnography software. Sensors placed on the body are connected to the head-box; head-box is connected through cable to the base system, which, in turn, feeds the signals to the computer system.