Long Story Short;
Bought a broken ESQ-1 Metal Version 240v (Australia)
Previous owner reported blown fuses pre and post battery replacement
Got it home and no blown fuses, no signs of life
When Mainboard is disconnected from power board screen goes into self-test mode
Voltages on mainboard average except +5V Digital which is +1.8v under load or 11.7v from Power Board
at this point my limited experience with synths has stopped me from being able to diagnose the issue but presumably something is pulling more power than it should be? possible Mainboard issue? Synth gods are mad at me?