Hi all, does anyone know the technical root cause of the IL65 mode being activated randomly upon AC power being activated?

Is there some backup battery running low? Microcontroller pin power sequencing oddity? I have 3x DSPs and they enter IL65 too much and I can't keep the mains powered on at all times.

Distributor3 for surround sound integration, Integra Pre/Pro, DSP5000.2's, DSP5000C.1 24/96, M60 mk1's driven by hot rodded DEQ2496, M33's