Hi
I have an iberna 10V12x electric oven from homebase and the door handle came away.
Take door off by inserting 2 small nails in the door hinge small holes while door is open.When nails pins are in then close door and pull door hinges out of oven. Both pins stays in hinges while door is off. Two screws at the bottom of door will allow glass to pull off. Then you can tighten the door handle screw. Re-assembly and put door back into oven by pushing both hinges in and then close door to release your nails and it will automatically relock. Good luck.
Joey
July 2013