long story short, when i was trying to fix resistor in R23,the pads came off both sides.. so i got frustrated and was carried away ,was trying to bypass some ,i saw smoke coming but coundnt say from where.. so then i came to knwo 4148 zener wasnt working (one of the pair-blackish area) ,then i bought a new one and fixed it ,now i have put resistor from one end where i get 16v and joined other end to jumper which goes to primary side i guess