Hartke GT100 power amp section schematic needed....

[AdrianM55]

Is there DC on the speaker?

Sorry absolutely lost track of this page and I just came back to this amp and yes there’s DC on the speaker out.

One of the diodes reads short both ways as well so I’ll start from that.

[AdrianM55]

So voltage is 240V in your country? And the previous owner installed fuseholder in 120V position then applied 240V to unit? It is then likely that some power supply components are damaged.

Schematic in post #8 above.

Noticed DC as Enzo guided plus one of the diodes looks bad so it’s a start.