Hi All owners of Mindray DC-3. If you system do not boot up: dismantle the motherboard housing, open the top cover. On the left you'll see the small flat BIOS battery (CR2032 3V). Check the voltage. In my case multimeter show 0 Volt. Replace the battery. Start the system. It will works fine like before. If needed, during the start up go into the BIOS settings and set the correct date / time.