As the title suggests. I removed the power managment chip already but 3V3 is still shorted to ground.Since the schemtacis arent complete i cant find all caps to test first.Can there be another issue to check first?
There is a device called "positional current probe" This can measure current in a PCB trace without damaging the trace in anyway,it measures the surrounding magnetic field. It is good for upto about 20 amps. Here is a link: https://www.power-mag.com/pdf/feature_pdf/1327592496_TTI_Layout_1.pdf
I've traced powerplane manufacturing faults on new PCBs, by applying a decent current between the planes in questions (say 5A), then using a sensitive volt meter (mV or uV settings) to plot the voltage drop profile between the -ve wire of the PSU, and various places on the plane (use a pin to make contact through the solder mask). You can normally see the voltage drop as you move from the supply to the position of the fault, and once you go past that it is stable. A bit of probing can normally locate the fault fairly closely.
Alternatively, an IR camera can also often show up a hot-spot at the point of shorting.