Blue Hawaii amp problem

Hello,
I have a problem with my Blue Hawaii amp.

I just moved from Canada to France and when reconnecting my BH amp, only the left light gets on, the right one stays off and there is no sound.

The amp was built to be plugged on a 230v power source which is the French standard.

I tried to contact Headamp and Justin (phone and e-mail) with no chance so far.

Can someone help me identifying what could be the issue and if I can solve it by myself? It would be helpful if I could know if it is coming from the amp or the pre-amp.
Thanks in advance for your advises!

My kindest regards
Eric