Jetson TK1 does not power on

Hello every one, I updated my jetson to L4T R21.8, it was working fine. I tried to connect a ssd, but my jetson doesn’t turn on. I measured the voltage in the power adapter (12V) and the voltage in +5V_SYS and +3.3V_SYS (both were at 0V). There is a short circuit between +5V_SYS and GND, the same for the +3.3V_SYS.
Somebody could help me?

Please share the serial console log.
https://www.jetsonhacks.com/2015/12/02/serial-console-nvidia-jetson-tk1development-kit/

Hi marco.a.oblitas,

We haven’t heard back from you in a couple weeks, so marking this topic closed.
Please open a new forum issue when you are ready and we’ll pick it up there.