DAG37AMB8C0 REV C not turning on after PCH replacement

[questore]

Come to me as PCH shorted so ordered the IC and replaced it.
BIOS chip was missing and since there is no s/n number on the board only assumed that maybe DAG37AMB8C0 bios is good for it.
Dont have the original charger so lab power supply is used for measuring. so I don't have AD_ID pin voltage

When the BIOS IC was missing and PCH was already replaced:
I have Voltages on:
Powerbutton (3.3v)
+ 3.3VS5_S (3.3V)
+ 5VS5_S (5V)
- no light on the charger LED

After BIOS is introduced to the board and flashed it with DAG37AMB8C0 BIOS:
I have Voltages on:
Powerbutton (3.3v)
- 3.3VS5_S - 0V
- 5VS5_S - 0V
- steady white light on the charger port LED

Board taking 0.008 milliamps on plugin
When power button pressed then goes up to 0.013 and for 2-4 second it varies then goes back to 0.008

What would you suggest to move on?
Should I get a charger and check if the problem is AD_ID pin?

[questore]

Found an EC and BIOS files for G37A board.
With this BIOS flashed,Now charger has white LED and when I press the power button then every power rail comes with good voltages.
Power button white LED also on, but after 2 second it shuts off.
When starting the GPU and CPU heating up for seconds, the fan spins and motherboard draws around 800 miliamp for 1 sec.
I have read that if this happens then I dont have correct charger (AD_ID pin voltage)
Now I will try to get my hand on a blue connector HP charger for test.

[questore]

New charger came.
New charger not giving out voltage.
New charger goes back to selling shop.
New charger ordered from elswhere...

[questore]

Got a charger from a friend for a 1minute test (280Wattage charger)
Laptop Turned on drawn 1,8Amp then shut off (with BIOS+EC BID0820D)
I'm wating for a genuine charger...but i dont think i will change anything.

[questore]

From other forums I have concluded that 5 long 3 short is a correct LED error if there is problem with RAM, CMOS BATTERY, SIO or PCH.
So I guess this could be my BIOS: 08209
Since I have tryed replaced CMOS battery I move on to find another RAM then reflow new PCH.

[questore]

Looking at the schematics table the Adapter select is only scaled until 200w (3v). since I have an original 280W charger that has 3.2V on AD_ID i was beginging to think maybe a too large charger could make the EC go to protection mode?
Partial sucess. Yes. I have plugged in a 230W charger and the power button turns on the laptop.

Now it turns on and draws 612-705 milliAmps but not do anything. All voltages are present and still 5 long 3 short.
Since DDR4_DRAMRESET is low (0.052v) despite 1.2 volt present, I have read that this could be a problem with BIOS not correct.
Next step is lets try to reflash all BIOS versions and see any of them is starting

[rumpumpel1]

>>>> i was beginging to think maybe a too large charger could make the EC go to protection mode?
It sounds strange, but I made a similar experience with a Lenovo X380: it did not start with an original Lenovo 230W charger, but it started with a 90W charger.

[questore]

- I have checked with 3 known good RAM in different slots.
- Inspected all pins on RAM slots.
- checked PCH top capacitors. all have 3.3v or 1.0v
- CPU 1.0v and GPU 0.9v are coming up, but DDR4_DRAMRST still low.

I'm out of ideas

[mon2]

Is this a Dell motherboard?

[SMDFlea]

- I have checked with 3 known good RAM in different slots.
- Inspected all pins on RAM slots.
- checked PCH top capacitors. all have 3.3v or 1.0v
- CPU 1.0v and GPU 0.9v are coming up, but DDR4_DRAMRST still low.

I'm out of ideas

Possibly cracked solder balls under the CPU. A ram slot tester can sometimes help https://www.aliexpress.com/item/1005003878784249.html

[questore]

Both PCH and CPU is bad. What are the odds?
Thanks