I recently bought secondhand a Mobile charging Station for my spark Led 4 is flashing twice which according to the manual means it is not up to temperature but it keeps doing it even after an hour or so on external power. If it's connected to the PC with a USB cable the leds show as they should i.e. Press then long press to switch on but go out as soon as you let go.
If I have the drone in or both batteries the leds at the back work but the front ones don't, It does not want to charge the main unit.
Is there any way to fix this?
TIA

The latest update I let the drone with a battery in drain down to 40% put the drone in the Charging station drone charged up and led 1 is flashing has been now for over an hour, Could this mean the internal battery is knackered?

Hello there RayzurReed. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please post a short sample video showing the said issue for us to see and assist you further? Thank you.

DJI Stephen Posted at 8-17 19:22
Hello there RayzurReed. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please post a short sample video showing the said issue for us to see and assist you further? Thank you.

Hi Stephen thx for the reply, How do I upload a video clip, please?

Not connected to power                  https://1drv.ms/v/s!AvXM7tqm85e8geRgxEsQV21RK4J4gg?e=gZFM9S

Connected to power brick           https://1drv.ms/v/s!AvXM7tqm85e8geRh0JJVEaKVlPERng?e=2ZvjZV

Hello there RayzurReed. Thank you for the reply and for these video link you have given. Upon seeing the video you have posted and since this is a used Mobile Charging Station for your DJI Spark. I would recommend for you to contact the reseller or you may also contact our DJI Support team at https://www.dji.com/support for further assistance and to see if the said charging station is still under warranty. Again, I am sorry for the trouble and thank you.