HP 14-dk1003dx Board 6050A3176101-MB-A01 No VCORE, no VCORE_NB Power Cycle

[m1ch43lzm]

Hello
I have this laptop HP 14-dk1003dx which has the following problem:
Power LED and fan cycle abuut 4-5 seconds on, 2 sec off, current draw is around 20mA from bench PSU

Board model: 6050A3176101-MB-A01, no schematics found, closest boardview is this 6050A2983601 : https://www.badcaps.net/forum/troubl...-x01-boardview

Original fault was shorted main 19v line by mosfet Q66610, no LED at charge port, i replaced original mosfet SIZ988DT with AON6992, short no longer present, charge port LED turns white, and orange when i plug in the battery
There was some liquid damage around U66600 RT3662AC, solder mask was darker at some places, which scraped easily, a broken trace at pin 14, which I fixed
I replaced RT3662AC twice, the first one immediately blew Q66610, replaced both and now the issue is as described above

Missing VCORE and VCORE_NB (controlled by Q66610), all other voltages are present
- 5v
- 3.3v
- 1.8v
- RAM voltages (1.2v, 2.5v, 0.6v)
- 0.9v near the CPU

Attached picture of U66600 area, i tinned those traces and applied uv solder mask where i fixed the broken trace at pin 14

Any ideas?

[mcplslg123]

What is the reistance to GND on L66010?

Very likely your APU is fried as Q6610 passed 19V to APU when it was shorted.

[m1ch43lzm]

Hi, thanks for your reply, resistance to GND is around 10 ohms on L66010 and L66020
on L66610 it's 9.6ohms (where Q66610 was shorted)

Neither Q66010 nor Q66020 were shorted
Touching the multimeter probes I get 0.8ohms

I replaced MOSFET marked in green (Q66610), the two MOSFETs marked orange were not shorted

Forgot to add, CPU is Athlon silver 3050U