DVR systems DVRxx04HF-A Series - Manual (Page 162)

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9 FAQ
1. DVR can not boot up properly.
There are following possibilities:
z Input power is not correct.
z Power connection is not correct.
z Power switch button is damaged.
z Program upgrade is wrong.
z HDD malfunction or something wrong with HDD ribbon.
z Seagate DB35.1，DB35.2，SV35 or Maxtor 17-g has compatibility problem. Please
upgrade to the latest version to solve this problem.
z Front panel error.
z Main board is damaged.
2. DVR often automatically shuts down or stops running.
There are following possibilities:
z Input voltage is not stable or it is too low.
z HDD malfunction or something wrong wit the ribbon.
z Button power is not enough.
z Front video signal is not stable.
z Working environment is too harsh, too much dust.
z Hardware malfunction.
3. System can not detect hard disk.
There are following possibilities:
z HDD is broken.
z HDD ribbon is damaged.
z HDD cable connection is loose.
z Main board SATA port is broken.
4. There is no video output whether it is one-channel, multiple-channel or all-channel
output.
There are following possibilities:
z Program is not compatible. Please upgrade to the latest version.
z Brightness is 0. Please restore factory default setup.
z There is no video input signal or it is too weak.
z Check privacy mask setup or your screen saver.
z DVR hardware malfunctions.
5. Real-time video color is distorted.
There are following possibilities:
z When using BNC output, NTSC and PAL setup is not correct. The real-time video
becomes black and white.
z DVR and monitor resistance is not compatible.
z Video transmission is too long or degrading is too huge.