Asus K55VD - backlight doesn't work

Greetings everyone

I have a problem on the backlight of asus k55vd. The backlight doesn't work all the time (probably because of liquid spill on the power module). Sometimes it's working but it doesn't light up the whole backlight matrix, sometimes it doesn't light up at all. Playing around the power module with a magnet dose the trick, but it's seems it's only temporary, and doesn't always work. Right now it's working and i did some measurements. Legend: Blue -> backlight on; Red -> changed value when the backlight is off

Plate: E89382 HannStar J MV-4 94V-0 rev 3.0. Could not find schematics / electric diagram.

Made the folowing measurements on J4601: 20, 21, 23, 24, 25 according to this topic: (see "lcd" picture)
post128399.html

Here is the pinout of the LCD jumper cable J4601

40
39 GND
38 GND
37 GND
36 GND_AUDIO
35 INTMIC_P
34 GND
33 GND
32 GND
31 USB_PP9_C
30 USB_PN9_C
29 +5V_CAM
28
27
26
25 +LED_VCC_INV
24 +LED_VCC_INV
23 +LED_VCC_INV
22
21 LED_BKLTEN
20 LED_BKLTCTL
19 GND
18 LVDS_LCLKP_PCH
17 LVDS_LCLKN_PCH
16 GND
15 LVDS_L2P_PCH
14 LVDS_L2N_PCH
13 GND
12 LVDS_L1P_PCH
11 LVDS_L1N_PCH
10 GND
9 LVDS_L0P_PCH
8 LVDS_L0N_PCH
7 EDID_DAT_PCH
6 EDID_CLK_PCH
5
4 +3VS_C
3 +3VS_LCD
2 +3VS_LCD
1

Measurements on the power module:
Once I got the same "backlight on" measurements (blue) on the power jumper (J6801) and the LCD backlight was off. So I am not sure where is the problem.



Here is the power jumper on the PCB:


Could not find a datasheet for D6806


I can't guarantee the info provided is 100% accurate
I already ordered a new power module, still waiting for it.
Thank you and sorry for my bad english.

EDIT: The hall sensor seems to work because
- the power button dose not work when a magnet is present
- is switching the backlight on and off

First of all look at the connector - it seems to be melted according to the picture. Did you try another LCD and cable? Where exectly the liquid was spilled and did you saw some signs of that spill?

Thank you for the reply. Which connector are you referring to? They all look fine. In the first picture, the LCD connector has a transparent sticker (to hold it on place) on the metal part that i haven't completely removed. I will make a picture when I'll got the chance.

I don't have any other spare to test the LCD or the cable, but I will try to borrow one for a quick check.

There was no sign of spill inside. The spill was on the keyboard, and in it's upper left side near the power module. I will provide a picture later.
The laptop was quickly powered off (including battery) wiped and held upside down. It was not powered until it was checked for liquid inside.