Dell 7506 2-in-1 laptop-no ac adapter issue

[mcplslg123]

MODEL:ELL 7506 2-IN-1
M/B: HELLCAT 14 MS TGL 8L (19860-1)
PROBLEM: NO AC ADAPTER

The unit works fine with adapter but gives this message. The adapter is genuine dell 65W(tested ok). PS_ID is working correctly and reaches SIO.R4305 is correct at 33.3 ohms.
PU4301 gate is correct at 3.3V as well as PU4415 gate voltage at 1.8V is correct. 19V reaches PR4401(CLR).

Charging IC is ISL9538C
01 Resistance between CSIP/CSIN is about 2.2 ohms(PR4422/4423 is of correct value)
02.Resistance between CSOP/CSON is also correct at 2.4 ohms (PR4424-25 is of correct value)
03.Connectivity to CLR is correct.
04.Charging IC Measurements(only adapter)
ADP-19V
CSIP/CSIN-19V
DCIN-18.4V
VDD-5V
ACIN-3.84V
ACOK 3.3V
SDA/SCL-3.3V
VDDP-5V

Bios flashed(both 16mb+8mb)
DC jack also replaced
Tried multiple dell oem adapter(65W/90W)

I dont find any reason why "AC adapter is not installed" message is shown in bios setup.
Dont know whether the unit works with battery or not as battery is not received from customer.

Can anyone shed some light?

Schematic+bdv attached

[tomodachi]

had a similiar issue in the past ;

https://www.badcaps.net/forum/troubl...charging-issue

Dell charge issues drive me crazy

[mon2]

I would monitor the PS_ID traffic with a scope or logic analyzer (1-wire) and compare to a known good logic board. A cheap logic analyzer ($10 is ok).