Urgent help is needed.

Got Dell N5010 for repair.

Changed shorted +VCC_CORE and +VGA_CORE outputting fets.
Also, replaced failing ISL62883HRT with a working recovered one.

Once plugged in, adapter light shuts immediately and PTC4702-PTC4703-PTC4706- PTC4707 short at once.
Fixed 4 new caps, they short again.

Please suggest as what is likely to make outputting +VCC_CORE electrolytic caps to short and short again, knowing that ISL62883HRT was already replaced ??? Where to dig further ?

Thanks

please check PU4702/PU4704, i think one of them is shorted.

Already replaced PU4702 found short for the 2nd time, though PU4702-4703-4704-4705-4707-4708 were replaced before.

Measured Resistance to GND on PL4701 without CPU, found 87 Ohms , very low!

Removed one leg of coils PL4701 PL4702 PL4703, found with GOOD SURPRISE 0.180 kohms resistance to gnd (before and after the coils), that's ok.

Re-soldered coils, and measured again coils'resistance to GND found 0.220 kohms, still good!

I couldn't understand why coils'resistance to gnd became normal, just after removal of one leg and resoldering it back ? I guess some discharge took place when legs were removed!

Now, when lap plugged in, lights ok and fan continuous spinning, but no display.
Will change the 4 failing caps and PU4702 and see.

Further to my last post, replaced PU4702 and faulty caps and powered lap, without CPU, fan spinned for 30 seconds then stops and lap switched off !!!
The 6 caps and fet PU4702 just replaced were found short again with PU4703!!!

Have to figure out first what is causing repetitive short to caps and fets before powering it again.

QUESTION : Is there a method for trying on lap without risking a new short for fets and caps replaced, that will be very helpful ???

I usually, measure(diode mode) the resistance of each gate of mosfets, and usually GND mosfet have lower resistance.
for example: gate PU4702:600 Ohm, and gate PU4703:400 Ohm.

note: when the gate of mosfet don't have any resistance, most likely the mosfet will get short.