Some more ideas
1) with ohm meter check the fine traces & be they are OK.
2) see if the manual has a block diagram. That usually shows signal paths
& major voltages. Much easier than following the schematic with all
its lines.
3) for more cracks check the PCB that the cracked one plugs in to.
Most likely place to find more.
4) The big IC on the cracked PCB is switching. You can measure voltages & maybe get lucky ! The manual will tell you the settings to use to get
the right voltages.
Zeno
