Acer Aspire 3 A315-41 doesn't work

[Neggo]

Hi everyone, I'm here on this section after coming from the BIOS one.
.My laptop powers on
.The power light is on
.The charging one isn't
.The laptop emits a "bip" when I detach the charging cable
.Charges my phone if I plug it in a USB port
.The CPU gets warm and the fan spins accordingly
.The screen goes from shut off to powered on but black in loop
. Already reprogrammed the BIOS correctly
. Already tried with an external monitor
.Swapped the Ram stick
. cleared CMOS and all simple tests
. motherboard doesn't have any visible damage apart some blue corrosion on some of the chip soldering

Can anyone help? Any suggestions before I trash this laptop? It was barely used until it showed this symptoms, repair shop said it was the key board membrane but I'm pretty sure that it has nothing to do with this.
I will try to post a picture of the corroded areas but I once saw a guy repairing a GPU say the corrosion usually doesn't cause any problems.

Acer aspire 3 A315-41-R8TH
s.n.:NXGY9ET0219100F38E3400
Model number:N17C4

Edit: I asked my sister how the laptop was be having before she abandoned it, and she said that she reinstalled windows, some of the keys didn't work, and she used the laptop with an external keyboard, but the laptop booted correctly and had display output, and did kinda work fine, the battery light also worked, orange when discharged and blue when fully charged.

[pc_okay]

Hello,

Sounds like your laptop is posting, and facing a no display issue.
You can try external screen with internal screen unplug (don't forgert to unplug battery first) some laptop won't work on external screen until Windows is loaded.
Check if it's not a backlight issue using a lamp to light your screen.

Try repluging correctly screen in the motherboard side and on the screen side.

Ps: corrosion can make huge damage !

[rogfanther]

So, it is very possible the keyboard was failing after she dropped some liquid in it. Then it was left unplugged for some time, and said liquid corrosion continued to grow inside of it. And now is shorting some pins, or have destroyed some component pads. When possible, post the relevant pictures .

[Neggo]

Hello,

Sounds like your laptop is posting, and facing a no display issue.
You can try external screen with internal screen unplug (don't forgert to unplug battery first) some laptop won't work on external screen until Windows is loaded.
Check if it's not a backlight issue using a lamp to light your screen.

Try repluging correctly screen in the motherboard side and on the screen side.

Ps: corrosion can make huge damage !

Already tried all of that. Thanks anyway for the advice