Hi,

Just got my first laser, a gweike 1390. I got the water running and tube connected but it wont fire (reci tube). I hear a small electric sound when I push laser, sounds like it comes from the plus-side of the tube. I have tried to move the magnet on the door switch but no difference. On the PSU the red diod lights up when i push laser and the fan is running. Don't see any colour of the tube either when pushing laser.
Any ideas or suggestions?

Best regards,
Mike