NVIDIA Tegra K1 wont boot

Dear Experts,

I have an Nvidia TK1.

When powering on, the fan starts and the green LED light turns on for 15 seconds. Then the system turns off.

When connected to a Monitor (tried 4k and 1080p) there is no signal.

Tried powering on with only power connected for 5 seconds and then connecting the monitor.
Tried the above and pressing reset. this powers everything off.

I am unable to boot or recieve any signal on the screen.