My flash doesn't works!

I've been using my Olympus Pen E-PL 1 for three years and suddenly the flash stopped to work , it doesnt even automatically pop up when I use the "forced flash" option

It didn't fell or anything I was just taking pictures at night and it simply stopped to work. Outside the camera everything seems to be normal, i didn't check outside, I erased all the pictures from my memory card but it doesnt change anything, I try to reboot all the settings but I didn"t found out how to fo this yet.

If you can help me it would be so amazing

thank you for your answer

Coline