I think I found the rootcause. Its a PU2001 (RT6585CGQW - 3Vand5V driver) + speciific PwrSeq on this board. This chip is damaged in specific way. There is leak of voltage to the ugate + shorted Ugate and source of Hiside mosfet (PQ2001) on 3VALW rail. So at the end you have follow situation:
- When MB is powered by battery only there is a leak on 3VALWS and I have there 1.2V.
- With the charger this leak is 3.4V which is really close what you should get on this rail.
According to PwrSeq. with battery only for S5 stage, 3V and 5V ALW is OFF. S5 stage with charger, 3V and 5V ALW...

So, for 230W, the measurement is correct; for 180W, it is not. However, I think there is no point in focusing on the charger anymore. Try doing what Mon2 suggested, and perhaps you will notice some anomaly.

In my case, which could also be helpful for you, I was focusing on the SMBUS between the EC, the battery, and the BQ. I posted all the data that I got (for comparison purposes). I analyzed that data with AI, and it seems to be OK. So, the issue lies somewhere around the BQ chip (HW issue) or in the EC software—where, even if it gets the feedback from the battery, it is not accepting...

I meant to measure resistance of ID pin on your charger, not on your MB. To eleminate charger....

Small update. Battery is not the solution for my case. I tested with 3 different batteries.
MTT97, is your laptop starts only on battery ? Your desciption when you plugin charger and battery is the same as main.

About the warrning, you should measure the resistance on adapter pin and ground on your charger. How many Watts you should have there ?
Here are few values.
170 W ~ 1,9 kΩ

230 W ~ 4,6 kΩ

300 W ~ 8,6 kΩ

P.S you have diffrent laptop/ MB so you should probably start your own thread.

Battery only:
REGN is floating from 0.2V - 07V. If your press the PWRBTN, the MB is coming ON for split second and turining off. During this time REGN goes to 6.1V (same voltage as with charger only)

Battery plug in + charger:
PQ103 D: 20,54V, S:16,41V G:16,40V
PQ102 D: 20,44V, S: 20,44V G: 26,33V
PU101 Pin28: 19,19V

Here the boot is cycling - MB is coming ON and OFF. When I diconnected the SDA and SCL from battery (remove the PR205, PR206). I can boot this MB in this configuration, unplugin the charger and MB remains ON but if turned off it will...

Hi Mon2,

Here are the measurement"
PQ103 D: 16.34V, S:16,34V G:22,42V
PQ102 D: 16,34V, S: 0V G: 0V
PU101 Pin28: 16,16V

Thank you for your prompt answer.
In fact I have exactly same issue with the specific behavior included as OP so rather to create new topic I just want to ask about the status from this one. Tested on 2 different batteries ( one replacement and second one looks line original but have very few Charge/discharges count so probably is also not the original from that laptop - check by SVOD) - same effect. On other forum I found that solution was to use the Original battery....

HI,

would like to bump this topic even if its quite old. Was that issue solved ?...

UDPATE:
It took a while to update this post. I forget about it - sorry.
CPU was fine. After replacing GPU and Vrams, laptop is working perfectly.
I can confirm that laptop wont start even if the Ryzen have integrated graphics untill the discrete GPU will by functional. Worth to mention when I start the laptop first time and I checked the setup in BIOS - discrete GPU was marked. So I am not sure what would happend if the switchable mode would be set. At that time I was not able to find proper BIOS dump with this Switchable mode set.
If someone looks for some values of resistance...

Hello everyone,

I have a question regarding this laptop. Laptop came from my friend, completely dead. No reaction for power button, Adpater etc. Diagnosis: burned HIS mostfet from VRAMs. After replacing the mosfet, Laptop starts to power up, KB lights up for few second and switch off, laptop remain ON but no display. Vents are switching ON after some time. No Caps Lock or reaction on USB stick. No display also through HDMI. All coils resistance seems to be OK except resistance on VRAMs – 15 Ohm ( as I study the other repairs or diagnostic of that laptop it should be around 90 -...

Nice. Good job!...

Hi everyone! I am from Poland and just came back to my old hobby which is repair electronics