Z-uno overheats and hangs

[martgreb]

Hi,
My Z-uno after some testing and working ok, suddenly started to overheat and hangs out. After 15 or 20 seconds after starts all three leds are starting to blink fast, chip is hot.
I've tried to make factory reset, but that did not helped.

[PoltoS]

Does it happen with nothing connected? Which power do you use?