G'day Terry.
Just pulled a DS Sys80 out of mothballs. Turns on (Power LED) but thats it. Hitting F1 enables the cassette desk to operate.
Troubleshooting in the manual points to a DS549 Transistor (which I can find no reference for online).
Only if you have time, would it be possible to flick me an email and maybe help troubleshoot this old girl?
The Dick Smith System 80 was my childhood computer and I'd love to be able to get it up and running again.