Put DC supply amp. 3-5
And press power button amp. 17-18
Open this laptop
Vin is okk
3v 5v coil voltage okk
1.8 v okk
Check RAM voltage - no RAM voltage
CHECK RTC SECTION working fine
I thought check io chip requirment
Io chip all requirements ok(EC_RST,LID SWITCH, POWERBTN#,acin,.................)
RSM RST ✅
POWERBTNOUT# ✅
But IO can't receive SLP_S3#/ SLP_S4# SIGNAL
NOW I CHECK
3V TO 3V PRIM 👍
1.8 V to 1.8 V prim
1.8 v prim input is ok
Enable is ok (3v_pch )
1.8 v output ok
But not generate power_good
I found 100k resister is show high
I changed this resistor
IO pin come voltage SLPS3#, SLP_S4#
The board trigger and give display