Lenovo 5250 led screen backlight voltage

[6ot4hr]

Hello, a friend brought Lenovo 5250 with broken lcd screen. Backlight fuse was blown and one ceramic cap shorted to ground... Anyhow, new screen will be replaced but there is one thing bothering me now. I reckon i saw 19V on lvds cable going to backlight fuse, but now when screen is disconnected it only shows 11.8V.

So a question, what voltage should be present for backlight 11.9V or 19V, i think something else might be off?

LCD Model is LG LP156WH4.

[smali]

Re: Lenovo 5250 led screen backlight voltage

If it is on(19v) charger then it must 19 volts and it is on battery only so ma be 11.8v.

[6ot4hr]

Re: Lenovo 5250 led screen backlight voltage

Hah, yeah, when on battery it gives 12V to inverter input, and when on charger than it is 19V...