This Kawai Session Trainer / Drum machine had no power.

 Session Trainer

1st Inspection did not reveal enything, until I removed the power board. 

inside

Two of the power caps blew, leaking electrolite over the pcb.

I removed the dead caps and all surrounding components. 

corroded

I then scrubbed the PCB with a wire brush.

 clean pcb

I tinned the PCB to protect it, made new links, replaced the caps & refitted the remaining components.

New