大华DVR常见问题解答（Dahua DVR FAQ）.docVIP

大华DVR常见问题解答（Dahua DVR FAQ） Dahua DVR FAQ If you have problems not in the following content, please contact your local customer service staff, or to the Hangzhou headquarters customer service consulting, we will be happy to serve you. Q: after the boot, the hard disk video recorder can not start normally Answer: possible reasons: 1. the input power is incorrect 2. switch power line contact is not good 3. switching power supply is bad 4. hard disk damage or hard disk problems Two: the hard disk video recorder will restart automatically or crash frequently in a few minutes Answer: possible reasons: 1. the input voltage is unstable or too low 2. hard disk jumper is not correct 3. hard disk has bad sectors or the hard line is bad 4. switch power supply is not enough 5. the front end video signal is unstable 6. poor heat dissipation, too much dust, too bad running environment Three: ask: can not find the hard disk after startup Answer: possible reasons: 1. hard disk power cord is not connected 2. hard disk cable 3. hard disk jumper error 4. hard drive bad Four, ask: single, multi-channel, all video without output Answer: possible reasons: 1. program does not match, upgrade the correct program 2., the image brightness is 0, restore the default settings 3. video input signals are either too weak or too weak 4. set up channel protection (or screen saver) Five: real-time image problems, such as video, image color, brightness distortion, etc. Answer: possible reasons: 1. using BNC to do output, N system and PAL system selection is not correct, the image will be black and white 2. hard disk video recorder does not match monitor impedance 3. video transmission distance is too far or video transmission line attenuation is too big 4. hard disk recorders, colors, brightness and other settings are incorrect Six: Q: local playback query no video Answer: possible reasons 1. hard disk data line or jumper error 2. hard drive bad 3. upgrade the original program file system different proc