HP Elitebook 745 G3 AMD DDR3L MAINBOARD MARKUP IMAGE AS BELOW:

POWER SEQUENCE OBSERVATION

SECTION WISE BOARD IMAGES AS BELOW:

CASE1 NO DISPLAY

BOARD POWER ON, ALL SUPPLY EXIST

DURING TESTING  DDR3L SPD WAVEFORM FOUND DEFECTIVE  CONTAINING FLUCTUATIONS

ALSO CHECK VDDSPD LINE FOR FLUCTUATIONS

3VALW TO 3VS SWITCH MOSFET Q7050 GATE VOLTAGE LOW AND UNSTEADY

SO REPLACED Q7051, NOW GATE VOLTAGE 13.4V

NOW ALL OK, BOARD BOOT WELL