Power shuts off automatically after about 30 seconds during boot up.
It is missing the SDA0 (BCM_GPIO-0) signal from the Raspberry Pi.
Put the system microSD card into a PC and use a text editor to verify the config.txt file under the /boot partition on the microSD card contains the following statement toward the end of the file.
Note: Make sure there is no typos gpio=0 <-- This is a zero
If that statement does not exist, add it to the end of the file and save it.