Hp Lh482p 5 short 3 long short after cpu vcore mosfet replacement

[jm942]

Hi,
My laptop went dead and after checking ,the main 19 volt power rail was shorted. After some checks i could identify that a high side vcore mosfet was shorted.
I replaced the mosfet and now the white powerled is present , fans start spinning but capslock shows the famous 5 long and 3 short code.

I checked the vcore voltages after replacement and i get for all 1.01 V so means for me that the driver is still working of the replaced shorted mosfet. On the Nvidia i measure around 0.8 V after the mosfets.
I did voltage injection on the cpu with 0.7V and i have a current of around 300 mA.
When i measure the resistance vcore to ground i have 0.9 - 1 Ohm.

Based on this i think my cpu has survived but what can be the reason of not starting the laptop then ?

Any suggestions , something i can check additionally to be sure my cpu gives signs of life ? As far as i can see i think all voltages needed are present like 3.3v,5v,19V

[mcplslg123]

High side VCore mosfet shorted=Killed CPU. You'll still get the vcore voltage and it'll behave like display is about to come but the wait is forever. thats the classic symptoms of a killed cpu by 19V.