Maestro B low power and shutdown while connected

Raul Pla

I just set up my new pre-loved Maestro-B. Without a battery connected but with the external power connected It shows a small message box just after power-up. It says low power and starts a 2 minute countdown to shut off.
There is also a light 1-second interval click (relay) sound from the lower right that starts even before the splash screen. I tried 2 other power 12VDC supplies with plenty of current available.
During the brief time its on its all good, I get on the 6600 and hear signals, etc.
I went over the user manual and nothing shows up for this issue.
Any help is appreciated.

Raul Pla

Problem resolved. After leaving the power supply on the Maestro a while the problem ended. There is no mention of this in the manual. Is there an internal battery that needs replacing? (Not the portable USB battery)

Gord-VA7GP

I believe the tablet which forms the front-display does have an internal battery, which only charges when your Maestro A/B is powered from AC. Which would explain what you're seeing.