Dell Inspiron 15-3521 no Vcore voltage

[bluestone]

Laptop Model: Dell Inspiron 15-3521
MotherBoard Model: Compal La-9104p
Processor type: Intel core i3
Ram type: DDRIII
Laptop power on ok but no display
I have diagnosed every voltage on this board still can't find the problem, I have flashed both EC and PCH bios still no results.
19v is present, 1.8v is present, 1.5v is present, 0.75v is also present, VR_On is 3.3v, but VCcore is 0v, I also noticed that VCcore line on Pc1228 is 0.02ohms to ground.
Can anyone help me on where to troubleshoot next.

[javed]

check shorting in core section

[Arun.shspl]

core supply is ok or not after that plz check clock

[bluestone]

How can I locate the clock generator?

[Arun.shspl]

down load pdf

[PINTUSINGH]

PLEASE CHEK 5V ENABLE VOLT.

[bluestone]

I have 5v and 3.3v working perfectly, I suspected its pu700, I replaced it but still no Vccore.

[Marouen92]

i have the same motherboard la-9104p rev 1
the fact that i have 5 motherboards and they have the same problem, they turn on, no display the cpu not heat....help plz