KGUARD Security TC series - Manual (Page 9)

4. Please Check Video System is set to NTSC. If not , change "Video System" from PAL to NTSC
→ Click“Apply”
When you save the settings, please exit out of all the menus until you see the live cameras. At that
point the device will tell you that it needs to restart. Click “OK”.
After the device restarts your DVR will be ready to operate.