this laptop work fine till i copy some file and unexpected shutdown and not turn on again i do this work


1-change charge ic
2-change i/o
3-flash bios and ec with worked one
4-heated the HM57 chip
i mixed up
all voltages is present like 3.3 power button and 3.3v EC flash ic but on the bios chip (4 mb )3.3v not present i know this voltage is reason of the problem

please tell me how i can solve this problem
thank you

replace RTC battery, it should turn on automatically.
if not, check KBC_PWRBTN_EC#(3.3v), press the power button, and see the response of PM_PWRBTN#(it should be 3.3v when power button pressed),
if no response of PM_PWRBTN#, reheat/replace PCH.

this will present when the laptop is turn on.