Chosen Solution

I found a old Netgear FVS318N v1.1 (without the Netgear power adapter). I plugged a compatible adapter (12V, 1,5 A), but the device does not power on. I am surprised to not find a fuse inside, and no component seems burned. Any repair idea ?

Did you check that DC adapter has same polarization than the original, did you check that adapter works? If yes and yes, and it didn’t work. You have code FUBAR.