HA Blue won’t boot, only red power LED on

Good evening everyone, I am using a translator to write this so I apologize in advance for any mistakes. As mentioned in the subject, I am trying to understand why my HA Blue no longer works. It has been in a drawer for a few years because of a move to another apartment. I have just found it again and when I try to power it on it does not show any sign of life.

The only LED that turns on is the red one when I plug in the power supply. In an Italian HA group they suggested that I might need to reinstall HA by removing the eMMC and connecting it to my MacBook through an adapter. However, I am having trouble finding this adapter easily here in Italy. Does anyone have any suggestions? Is there a way to connect HA Blue directly to a PC using one of the available ports, or do I really have to remove the eMMC and use an adapter?

Thank you very much in advance for any help.

Have you attached any monitor to it yet ?
NOTE: while your at it, Changed the battery to new, and also plug in the Ethernet cable
PS: I also noticed no cables to the Heatzink ?