10 x Adastra DM25 mixer amplifiers and 10 x Adastra DM40 amplifiers all with suspected same fault.

Diode D4 fails.

Picture show repair that can be done of you don’t want to spend time on taking board out.

All boxed and probably out of box failures.

We haven’t the time to fix these.

They sell for £80-£100 each, so there’s potential for nearly £2k when fixed!