7039A-I; X11DAI-N System failed to power up. Also, where is the pin-1 of ribbon cable that is connecting between front-panel and motherboard.
Please reseat CPUs/DIMMs and to execute CMOS clear process for system boot-up issue.
FYI,
Please reference to
page-62 for CMOS clear process and
page-45 for front control panel cable connector information.