Just to make it clear, I measured the voltage on the connector on the board, not on the AC power supply.  So the board was getting 12+v.  I don’t know how it is supposed to be distributed on the motherboard nor appropriate test points so I didn’t do other measurements.  Recommendations welcome!

My Cube Mix Plus has a problem like this one.

The battery was no longer charging when AC power supply was connected.

The system continued to work until the battery was discharged.

No sign of life since then.  The LED is not on.

I tried another AC power supply.  No difference.

I left it on my shelf for several months — I didn’t know what to d…[Read more]