PSVITA bad LCD backlight, help to find correct voltages

Hi all, I have a Sony PSVITA 2000 (slim model) with monitor backlight that doesn't work (completely off, while monitor itself and touchpanel are ok). Anyone so nice to share the voltage readings at the AMTEL chip behind the Vita battery for me? I have the readings in attachment

My guess is the voltage regulator or some transistor is faulty on the mother board, but I need to trace back the voltages to find the bad guy

Thanks a lot in advance

 

I'd imagine most of those are digital signals, not power lines.

You can't really measure them with a multimeter.

 

Definitely so, but one has to be the power line indeed... Any clue which one?