Yeap.. Two of them are smoked. One p-channel and an adjacent N-channel.
Removed them both from PCB and now the short is gone.
Powered the board.. 3.3V rails are OK
BUT : I ve measured the full voltage of 18V DC across an Atmel EEPROM near the MPU!!
MPU itself is powered down (monitor on standby) and the Vdd measures less than 1V
So something else is also smoked too since 18V have reached the EEPROM chip...which means more parts are dead.
Maybe is not worth looking into it further...