Acer Aspire e1-570 backlight needs fixing

[HackedFridgeMagnet]

My sons Acer Aspire e1-570 is missing the backlight. 3 months out of warranty.
HDMI out is good, screen shows up with a torch shined on it.
I took a punt and replaced the screen but the problem is still the same.


I am guessing the power supply for the backlight, which I guess is on the motherboard.

Has anyone got any info/ schematics, especially the 30 pin connector pinout?

 
the 30 pin connector looks like this
http://www.amazon.co.uk/ACER-ASPIRE-E1-570-REPLACEMENT-SCREEN/dp/B00K88IBEG

Also could it be some power monitoring setting?

[Rasz]

I took a punt and replaced the screen but the problem is still the same.

http://kythuatphancung.vn/uploads/download/9f125_Compal_LA-9535P.pdf

backlight usually doesnt die without a reason, Im guessing liquid damage on the motherboard = eroded connections under lcd connector, backlight fuse or backlight boost converter chip & its passives.
You will need to take pcb out. Start by inspecting for moisture signs, pink/red copper pads, grey residue on solder joints, or even missing smd parts. Use magnifying glass/microscope and continuity tester. If you cant find anything then next step is connecting everything outside case and measuring voltages.

[senso]

Check around the lcd connector, I have already repaired many that had a failed mosfet, its easy to spot it, its always a big-ish cooper flood around 2-4 pins of the lcd connector and should have 18-19v when the laptop is connected to the charger.

[HackedFridgeMagnet]

Thanks for the schematic that is great!
Liquid on pcb sounds plausible for a kid. Or me for that matter.

Ok ok noob mistake.