Secant display backlight dead

[lilimike]

I have this display from Secant and the display backlight is dead.
The touch screen is working and I can still see the information if i shine a light on it or in bright daylight. I figured it's only the LED or whatever is lighting the back of the display.
This is the complete unit (back of display bottom left):


Front of the display:


Am I right to think the two black wires are providing power to the backlight?
If it is, it's got to be AC voltage as the wires are coming out a the small transfo.
What should the voltage be? I'd like to feed the voltage directly to the display to rule out this part.

 

[lilimike]

After removing the metal frame from the LCD I discovered the two black wires are going to what I found to be an EL backlight. It is plastified, doesn't look damaged and doesn't look like it even can get damaged. A bit of Google browsing shows that I can probably feed it with 110VAC to light it but I decided not to. after unpluging its wires I discovered the secondary is open on the small transformer which is obviously where the problem is although not sure about the cause.

The markings on the transfo is:
990201-06
ET 5181

It has 8 pins but only 4 are wired.
With the markings I cannot find anything on the net.
Primary is 3.4Ω

Anyone have a clue?

 

[Mr RB]

It would be a custom wound step up transformer. There's no easy way without unwinding the secondary and counting turns then rewinding it.

The easiest fix would be to buy a tiny EL backlight driver module, and just use that to power the backlight.