820-00239 Several Liquid Damage , backlight starts but no Image

Hi guys, hope all is doing well with everybody

I got a 820-00239 that was liquid damaged and I cleaned up all the crap but, even if I leave just the battery, kbd, trackpad and display, it turns on the backlight but doesn't show any image...

I've replaced the LCD cable and stills the same

Any help would be appreciated

Can you confirm USB activity?
What about external monitor?
Disconnect any cable; keep only USB-C connector when test the board (no battery).

Hi, bud

USB has power BUT my external drive doesn't show any activity like LEDs blinking.
No External display

I was measuring all rails and the first one I found a different measurement was the PPVCC_S0_CPU that has only 1V and the schematics state 1.5v (display plugged).

CPU core power rail (PPVCC_S0_CPU) is dinamically adjusted.
You should note it changing the value in the first 10-15s, between 1V and 0.6V.
Fix 1V is not good; looks like your board doesn't really boot.

Something affected by liquid, possible CPU.
You should try ultrasonic bath cleaning.