Help diagnosing LCD Backlight

The in-law's shop security screen "just went dead" the other day.

It's an embedded system with a 10" screen, 4CH cameras.

http://www.jaycar.com.au/productView.asp?ID=QV3030

I'm not sure how to diagnose the backlight (as that's what I believe has gone wrong here).

JPG attached is the backlight part of the circuit, I'm just after:

I really have no idea where to start - I have a multimeter - but I assume the backlight (CCFL) is going to be around the 1 to 15KV, therefore there's no "quick" measure to see if the output is normal...

Any hints?

 

A quick glance shows R122 at the bottom looks very heat damaged.

You could remove it and check its resistance.

Another big cause of CFL driver faults is bad electros, I would just replace those 3 electros next to the inductors. You need to replace them with 105'C low-ESR types.

 

Thanks RB - exactly the advice I was after!

 

I pulled the LCD apart and extracted the backlight, looked up the model number - It's an LED backlight; runs off 200mA @ 9V...

/facepalm

That simplifies things a lot.