Thanks Tom, I have managed to discover the error.
Although I followed all the correct indications, I still could not connect.
By simple chance, I tested with another power source and ASTROEQ has connected without problems.
The fault has been that I have been using a 12V connector that is not suitable.
I have compared both sources of energy (voltage, etc.) and I have discovered that the power source that did not work has a different connector.
At first glance they look the same, but the caliber detects the difference between the two, (- 0.4 mm / Ø).
The funny thing is that when you connect it, the ASTROEQ LEDs light up and flash normally, so there does not seem to be a voltage failure.
Regards,
Juanjo