A3000 diagnosis - dead PSU?

[strim]

Hi!

Today I managed to break my recently restored Amiga 3000 :mad: . I was in a hurry, so I tried plugging serial cable when computer was powered on. How stupid that was... Ofcourse, short-circuit on serial port pins ocurred, and Amiga powered down. Now I can't even turn it on.

I see that PSU fan does spin for a second or two when I push the power button. Then it stops and literally nothing happens. If I cycle the power it's the same.

Power supply is dead, I presume . Does A3000 PSU have some kind of fuse? Any ideas on fixing it?

[strim]

Guys, thanks for all the suggestions. First thing I tried was disconnecting PSU from main board. However symptoms are the same - few spins of a fan, then nothing.

I see that there is no "power good" signal in A3000 PSU, so it should just work after pressing the button, even if mainboard is not connected. Right?

[strim]

Fortunately only PSU was broken (dead voltage regulator). Now my PSU is fixed and everything else is working! Including CIAs and serial port :-).