I've heard good things about Gigabyte. The Gigabyte P35-DS4 is popular among enthusiasts. Could it be an engineer who wrote in Chinglish? Maybe he meant "Checking system health..." Thanks for the info DjLizard. I have had this computer for at least 8 years and it is only recently that it has given me this message. Edlemannen - The message is definitely Check System Health! I Googled Check Sytem Health! and there is quite a bit of information on this all pointing to either the cooling fan or the BIOS settings. I am still looking for the manual which I may have lost when I moved. Impi I have exactly the same problem, but in addition to the message " Check system health ! Vcore=2v" I am getting a two tone warning beep immediatly I switch on. I have checked the BIOS but there does not appear to be any means of adjusting Vcore. CPU temperature is normal at 27 degrees and the CPU Fan is operating OK My motherboard is Gigabyte BX2000. Has anyone solved this problem yet?