ACER NITRO 5 8TH GEN BOARD LA-J871P

 it for DC jack replacement. Check on DC JACK 0 volt.
Found customer’s charger faulty. Connected power supply but there was some continuous noise (tiktik,tiktik)in my power supply. Load 0.01Amp.
Check on DC jack -19V,means DC jack OK.
INPUT COILS,FIRST MOSFET DRAIN =19V, SOURCE =0.1 TO 0.7V FLUCTUATING, GATE VOLTAGE ALSO SAME 0.1 TO 0.7V
CHECK FIRST AND SECOND MOSFET ,BOTH FOUND OK.
REMOVE AC DRIVE RESISTOR AND CHECK STILL SAME CONDITION NO AC DRIVE GENERATING.REPLACE RESISTORS STILL SAME
CHARGING IC VCC =19V, REGN =5.95V ,ACDET= 2.5V OK.,BUT ACOK=0V
CHANGE BOTH VOLTAGE DIVIDER RESITOR FOR ACOK,STILL OV ,SAME CONDITION,
ASK FOR HELP ,RENUKA INFOTECH ASKED ME ABOUT CASE AND SUGGESTED TO CHANGE CHARGING IC
CHARGING IC CHANGED AND CASE SOLVED
THANK YOU VERY MUCH RENUKA INFOTECH SIR &
THANK YOU VERY MUCH SUBODH SIR FOR TEACHING US SO NICELY IN DEPTH AND DETAILS.