I think i have fried my HereLink Air Unit by accidentally reversing the input voltage polarity (powered up from a DC power supply @ 7.6V). The air unit does not turn on LED-2 (Right) anymore when connected with correct input polarity. As per the user manual this means “Air Unit is not Powered”.
I tried to connect the air unit with a computer using the micro-usb (debug/upgrade) port and noticed that LED-2 turns On first for 3s (yellow) and LED-1 turns on after 1 second (Yellow) and both LEDs turn off simultaneously. The pattern repeats every 10 seconds. Input Power is not connected and both UART and HDMI inputs are connected to Air Unit.
@philip: Is there any way to recover the air unit? Can i purchase an Air Unit separately?
I also want to ask if there is any kind of reverse polarity protection & out of range voltage protection implemented or planned for the future?
Waiting for some good news