Samsung NP400B2B AEGIS-12-M BN41-01547A short circuit

Hello everyone,

I had an old 12" Samsung NP400B2B notebook.
CPU i3
Board: AEGIS-12-M BN41-01547A
I stucked with repair of this board. 19V input looks like short...because adaptor over current protection works, Voltage drop.
Looks like classic short...but not.
If you measure the input it is good not short, but after fet side side all 3.3V and 5V is short, most of mosfet capacitor short. Battery charge also not work.
I can't "learn" the circuit, because everything is short. (i'm think on the PCB layer is short...i hope not)
I try to found short materials with classic heating methode, but just the 2nd 4435D making heat...nothing other.
Have you got schematic? or where can i found? or any idea?
...not an popular model
Thank you

Did you make a "short test" described in TRAININGS sub-forum (Szkolenie nr 1)? It is the fastest way to find component causing short circuit on 19V rails. Please note that you may need to use a thick cables to make this test effective, and sometimes it does need more than 5A to put into the circuit.

It has GND realy huge short.... around center of PCB ...around an broken area
The large GND layer dissipate the heat...very hard to found ....
Finally I cut with sharp knife the short layer...and wow... 19V area start to work...but board not work problem at charge area
I think this board heavy damaged...repair delayed..maybe in the future...

angyalpc ha scritto:The large GND layer dissipate the heat...very hard to found ....
Finally I cut with sharp knife the short layer...and wow... 19V area start to work...but board not work problem at charge area

Please post a clear photo of that "cut-off".