First of all, I would like to inform you that this motherboard has been out of support since June 2013 http://www.intel.com/support/motherboards/desktop/sb/CS-034322.htm and the support that we offer is only in English.
However these are some recommendation we can provide for this kind of issue,
- Test the board out of the chassis to discard a grounding issue. Please use minimum configuration such as Motherboard, processor, 1 memory stick and power supply. No video card. This motherboard comes with integrated graphics; the video card is not necessary for this kind of troubleshooting.
- Make sure you are running the latest BIOS version available for this product. https://downloadcenter.intel.com/SearchResult.aspx?lang=eng&keyword=Intel%20Desktop%20Board%20DH57jG&DownloadType=BIOS
- Remove the CMOS battery and leave the system without it for about an hour. Then put it back on and restart the system. http://www.intel.com/support/motherboards/desktop/sb/CS-028780.htm?wapkw=clear+cmos+battery#datetime
- Turn off the system and start including 1 product device at the time, in order to find out which device is causing the behavior.