Hello,
I have a Palo Alto PA220 firewall that has suffered damage from reverse polarity.
Now, when 12V DC power is applied to either input, the corresponding input LED lights but there is no further sign of life. The current draw is 70mA. Interestingly there are no signs of any damage (burned components etc).
I have uploaded pictures of the whole PCB as well as closeups of the power supply section of the board.
I'm wondering if someone experienced would be able to help me troubleshoot.
Thanks,
Peter