The screen remains all black, the analog board is good (tested with another SE and the half-video SE/30, the one in the other thread)

The "slower" tone only happened once, after rebooting the machine it came back as usual

I also replaced one of the Bourns filters, RP2 if I recall correctly (desoldering it was quite a pain) but it still doesn't boot

So, At this point I'm still stuck with black screen + no boot