HP P2035 Power Supply - RM1-6345 MOSFET + Gate Drive Transistor replacement

Hi and tnq you all for your time
I have a HP P2035 which its power supply is not working.
After many test it turns our that swiching mosfet K4005 is burnt, also 4 smd resistors are gone open.
The gate drive transistor Q502 with code H.Q is damaged too.
Now i need the exact value of two resistors, R503 which is for gate-source and R508 which is to bias transistor Q502.
(mentioned resistors are wiped out info and i am interested to go firt for real values before checking needed value by a potentiometer).
Following parts are not availabe to me and im seeking for a replacement of them by a good ones:
2SK3534  ->  K4005
BC817 (sot-23)  ->  H.Q (sot-323) maybe its real code is 2SC4155A

Tnx in advance!
Following is an image of the board (don't think about missed parst as soldered out for cleaning or somthing else)