First steps, filling the boiler not working

[Ohubean]

I hope someone can help.
I have just received the Mini Vivaldi II and I am in the process of setting it up. I have filled the reservoir and put the drip tray back. Plugged it in and the standby light is blinking. I have held down the on/off button and the boiler button simultaneously for over 30 seconds and nothing is happening. The instructions say it's suppose to be filling the boiler but there are no other lights or sounds going on.
Does someone know what I should try?
Thank you in advance!