Shenzhen kind words high professional LCD monitor manufacturers www.m-yg.com 
 Warranty service is limited to normal use of the effective warranty period, the quality of the product itself as non-human damage caused by the failure, according to state regulations will enjoy the following Warranty Services. 
 1 where the company produced products, can enjoy 1 year free warranty service; 
 (2) from the purchaser from the date of receipt of goods, quality failures occurred in January or less, the product looks intact, complete accessories and packaging materials company is responsible for replacement free of charge; such as the appearance of injuries and accessories products and packaging materials not only give the company complete Free repair; does not provide a replacement; 
 3 lifetime cost of maintenance, technical support for life. 
 4, the situation calls for more specific advice. 

 1, the monitor industry standards, professional monitors the input signal amplitude is 1Vp-P ± 3dB (about 0.7Vp-P-1.4Vp-p), the input impedance of 75 ohms. Therefore, if the input signal due to cable attenuation, impedance mismatch or transmission cable BNC connector production of non-standard and other factors, the input signal amplitude much lower than the 0.7pp; or because the camera's output of some non-standard or non-standard access access devices (such as splitters, amplifiers, etc.) lead to the input signal amplitude is much larger than 1.4Vp-p, the images are likely to cause distortion, horizontal and vertical sync and so on. 

 2, a wide frequency range as video, video signal transmission more vulnerable to interference (including the 50Hz power supply noise, electromagnetic interference, etc.), thus affecting the image quality. Interference can cause severe image distortion, deformation, roller, horizontal and vertical sync. Therefore, monitoring the installation process, the video cable must be away from electromagnetic interference source. 

 3, front-end equipment, control equipment and terminal equipment, the host potential is the potential difference between the video signal will interfere, resulting in distortion of the image signal or image appears raceway, if access to the entire system when charged (ie, front-end equipment, the master equipment and terminal equipment are in the energized state access BNC connector to connect front-end devices), probably due to front-end equipment ground (actually, is the transmission cable shield) caused by ground-potential difference between the jump fire, the flash will destroy serious input components or PCB board casserole deposited within the prefecture-level line. Cause the input open, the input image without fault. Therefore, construction of the project monitoring system should be strictly in accordance with standard design and construction. Ground bus should be enough cross-sectional area of ??copper wire, front and rear side of the surface-resistance of <1Ω, grounding cable must not form a closed loop, not the zero line of the grid with short strong or mixed access. 
 Long life, stable operation, no burns, injury, low maintenance cost.