I'm out of things to try. I replaced this unit and both have the same issue: power light solid and fan turn on but no display.
I've tried two different monitors and a plasma tv. Two direct HDMI cables, one mini-DP to DP cable, HDMI-DVI and min-DP-DVI adapter (for second monitor).
I've tried RAM in top slot, bottom slot and both slots (Using this RAM: Crucial 32GB Kit (16GBx2) DDR4 2133 MT/s (PC4-17000) DR x8 SODIMM 260-Pin )
I've tried SSD in both slots (this SSD: Samsung 850 EVO - 500GB - M.2 SATA III Internal SSD (MZ-N5E500BW)
Also tried no SSD and RAM only.
I formatted two separate usb drives to FAT32 (using mac disk utility and diskutil command) and placed the KY0050.bio file in the drive. Removed security jumper. Boots with solid white light and fan. never blinks indicating the update is installing.
Since this is my second unit, what else can I do?