The standby switch on my Ada-1500 is no longer working. It doesn’t matter if it’s depressed or out the amp stays on. Anyone else ever have this issue or do I need to contact Axiom about a replacement button?

LFR1100
VP180HP
EP600
M3 In Ceiling x 4
M5OW
M2 - Atmos rears
ADA1500.5
M3 Outdoor Speakers
ADA 1000.8