LA-7912P (NO DISPLAY)

[Ermansha]

BOARD NAME : LA-7912P
PROBLEM : NO DISPLAY
DC LOAD : 0.850 TO REGULAR INCREASE
FOUND ALL COIL IMPIDENCE ACORDING TO GROUND OK THERE WAS NO SHORTING.BUT PL 22 +VGFX_CORE NOT BUILD.PROBLEM FOUND .. PROGRAM GOOD PCH BIOS BUT NO DISPLAY THEN PROGRAM EC BIOS DISPLAY COMES ..
ASSEMBLED THE LAPTOP THEN LAPTOP NO TUN ON AND DC LOAD 0.003 .CHEK AND FOUND COIL PL7 IMPIDENCE 000.. USB SUPPLY REGULATOR SHORT REMOVE SHORTING OK 3V5V OK LAPTOP ON BUT DC LOAD 0.040 ..CHEKED +5VALW TO+5VS AND +3VALW TO +3VS NOT PRESENT BECAUSE +VSB NOT PRESENT SO I UNDERSTAND ... ALL VS VOLTAGE NOT TRANSFERED. SO TRACE BACK FOUND PQ6 FAULTY CHANGE THAT MY WORK DONE SUCCESS ...

FAULTY PARTS AND POINT
1. BIOS PROBLEM
2.U17
3.PQ6