I have a simple question.

The motherboard is LA-9104P. Came to me already messed up bu someone else. There is КЗ (Short circuit - 0.4 Ohms) on the output side of coil Pl500 (VCCP ->+1.05VS)
Since the CPU is the only thing that is powered by that power rail, can I be 99% sure that the CPU is fried? I tried to inject voltage on that point (coil removed, board disconnected from ЛБП), but nothing on the board gets heated up.

hi there! you have short to ground via 1.05V ?
VCCP/VDD must be - 1.05V

also need to chek and replace
TPS51212DSCR IC

Thank you for your response. Will try it now and share the results later.
Edit (I can only send one reply per hour):

VCC_CORE (measured at PL701 with coil attached is 6 Ohm).
I removed the TPS, found PQ203 and PQ205 КЗ, removed them, now on the same point of VCCP/VDD I have even less (0.3 Ohms). Can it be some capacitor shorted? I'll attach picture now. Afterwards I will remove ISL.

ok, also must be cheking PU700 ISL95833HRTZ - was two boards with this problem
and what is resistance on rail vcc_core ?
CPU 1.7 Ohm must be

Same thing with ISL removed.
Resistance on PL701 - 5.9 Ohm
PL700 - 3.8 Ohm

On the marked place on picture - 0.3 Ohm.

so remove CPU and try to supply this line from 1 volt to 5 volts slowly (with current under 2 A) and finde overheating details. It's possible to finde some broken ICs and mosfets//

Yeah, that was what was I referring to when I said injecting voltage. I already did that on that line, but nothing heated up. Although, I was doing that with the processor attached, as it is soldered and I don't have infra-red station to be sure that I can re solder the CPU back with 100% precision. I can re solder smaller chips by hand (even PCH), but not something with > 1000 balls. At this point repairing this board became economically unfeasible, as I found UI circuits (the ones with 8 pins around USB - AP2301MPG) shorted also (removed them) - but the КЗ is still there. I will try few other things and report back, but it looks as this board is going to end up into the donor pile
This is link with a similar problem viewtopic.php?f=41&t=30371
Thank you for your help, it was helpful, I learned a lot from it.
Will report if I find something later today.

yeap
in this topik was replaced new IC PU300
and DDR3 plane

The board was returned without repair. The thread can be closed now.