Cinema 30" black screen

Hi,

so one day my Apple cinema display HD 30" simply stopped working. If the display is plugged in the computer and if I point a broght light at it, I can hardly see whats on the computer. So yeah the display is actually working but the backlights arent. The light on the frame turns on when I turn on the display, and afcourse then it turns off. I opened display and checked the J2 pin voltage, it is 31.5V. Is this allright?

How can I check voltage of pins on inverter board? And how can I check if backlights are working? Where can I get those parts, is Apple still maing them?

I hope some of you could help me.