Hello
due of a lightning my RB2011 won’t turn on. Connecting a power supply it goes in protected mode. Opened the case I found a burned component, the one marked as “L2” but I wasn’t able to identify it… removed it, obviously the power supply is working but the RB is off. Does anybody have an idea about this? is it a diode, a zener a Varicap? Really no idea…
I attach a pic of the board where the L2 was placed, is marked in red.
Thanks in advance, Leonardo
That seems to be inductor, what number is on it ? Its probably a part of a power supply so no wonder it wont work.
But in case of a lightning strike… Hardly there is only one component faulty…
Hello, thanks for answering me!
as I can see it was just a peak of power, the lightning didn’t hit directly my house, I had few damages (router, only the VDSL port and the RB).
Visual inspecting the RB it seems to be ok, anyway for a few cents component I can try to fix it 
sadly there’s no number on it, ot it’s no longer readable, so I cannot identify it
FB1 CB04YTYH800 Viking Tech Corporation Ferrite Bead 80 Ohm 3A 1204
YES! I got the info from a very kind support system.. now I have to find it 
thanks all for support
Ok I found the component on Aliexpress for less than 2,50 euro… 100 pieces… It will take its time to arrive, as soon as I’ll get it I’ll do my test
Passive components don’t burn out alone, unless we are talking fuses. Expect some silicone nearby to be fried as well.
You can short-circuit the inductance to do a test. The Schottky diode must be broken and something else in the red circled area. In general, do not wait for inductance, look for other burned parts. Burnt inductance is a consequence, not a cause.
Why didn’t you show the other parts, because the filter inductance was not the only cause?