1999 foreman 450 es problems

i have a 1999 foreman 450 es i recently got from my brother for free. he bought it for cheap and has not tried to get it running.
it has no power to anything. i have tried a good battery and a charger. changed all fuses. changed the solenoid just because i had a new one. anyone know the issue?
i was told it could need a new ignition and ecm. could the ecm cause it to have no power to anything? not even the headlights come on. i can short the solenoid and the engine turns over.