i try to repair this board. my board is from netpower 16P, only one port (port5) have problem cause lightning. In winbox there's message about overload voltage to this port.
I find out theres short a diode and a resistor was burn on top side pcb, On bottom pcb there's a Ic was burn. Some digging get the ic is from texas instrument TLV9002 (marking code 1GNX).
change diode and resistor and remove the ic. Leave ic not populated cause i don't get replacement for this part. Try to fire up, but still get the overload message.
Interesting, I'll try that on a few of my damaged boards. Also, as far as I can tell, they use the same boards in all switches, power connectors being the only difference. At least, PSE-8 and PSE-24 are nearly identical.