Is there any chance we are mixing threads here ? The poster's power light is on, so presumably at least some power is getting to the sub...

The *other* EP500 thread seems to be a power problem for sure.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8