hi every one i have this laptop and no LPC activity and this trouble come from when i plugged led cable and don't know what was wrong laptop trued off and now not boot and restart repeatly
i do ..
1-program bios chip
2-check for 3.3 and 5 volt its OK
3-chang the KBC (after that laptop not power at all i test with two IT8570E )
i replace old KBC ...laptop turn on but restart and no display


i think this problem of PWM circuit i check the choke near CPU one of this choke have in one side 1.2 v and in another side have 9 v i mixed up

this is pick

It's correct for simple multimeter. If you check by oscilloscpoe you'll see the difference.

yes you right but what solve this problem >??

Check all voltages on coils
Replace CPU
Connect POST card to DEBUG1 connector

hi i replace cpu but restart fast more befoer and not successful
- the rt8856 warm few
-LPC not activity