▼Question: why no pictures display on the monitor? Answer： 1 Check the video output line, does it well-connected? And does the monitor is AV input? 2 If the monitor is well-connected, please check whether the main control board is with power, if not, please checks the adaptor (power) output. ▼Question: why it shows no signal on the monitor of some channel? Answer： 1 Check the video output line; you can try to insert the line twice. And rectify the video line 2 if sometimes there have video, sometimes have no video, that is the problem of the video output line, you can change another video output line ▼Question: why have no audio signal Answer ： 1 Check the audio line; you can try to insert the line twice. And rectify the audio line 2 If sometimes there have audio, sometimes have no audio, that is the problem of the audio output line, you can change another audio output line 3 check does the audio output switch is ?ON?/DIV> 4 Check does the video port that corresponding to audio is switch to single picture display. ▼Question: why client software can not use Answer： 1 check does the INTERNET SETUP is correct: for example if you choose multi display protocol, then the IP address of client software and server is using the same subnet mask and net sect; if you choose UDP protocol, must make sure the Gateway setup is correct and active. 2 make sure the IP address is the unique one that on the internet ▼Question: why the remote controller can not control the menu, while the picture is ok but can control through the panel menu? Answer: 3 that is because the battery with weak electricity, you can change another new battery. ▼Question: after long time working, the LCD has no pictures or maybe other problems. Why? Answer: 1 Please you can renew system and re- startup the DVR. ▼Question: Why cannot detect hard drive? 1. The HDD power line or data cable is not connected well. 2. Please check the power cable and data cable. And format the HDD. ▼Question： Why the remote controls not work? But the mouse is workable？ 1. The remote control ID was set "OFF" in system menu. Or it was set wrong ID. ▼Question：Can we delete a part of video file in HDD? 1.No, it can`t be done. For the reason of safety, we can`t delete a part of video file in HDD. If you want to delete them, please try to format HDD. ▼Question：Why alarm is not workable? 1. The schedule setup is wrong. 2. Alarm setup is wrong. 3. Alarm cable connection is wrong. 4. Alarm input signal is wrong 5. It is not recording. ▼Question：Why cannot find the video file in search menu after recording? 1. The time segment for search is wrong. 2. HDD cable is not connected well. 3. System date was wrong. 4. The system format was changed. ▼Question： Why there are no video output when connect DVR with camera？ 1. BNC connector not connect well. 2. The system format is different between DVR and camera. 3. Modified the system date back.