DA0U81MB6C0 REV C No Power

[kalilinux25]

Hi board will take only 4 milliamp and goes 100 for a second then goes 4 again..

Checking for Shorted to all mosfet no issue

CHECKING
+3.3VS5_S present and stable
+5VS5_S present and stable
ACIN 3V stable
+3VPCU present stable
NBSWON1# present stable

EC_PWROK and RSMRST# not present

[mcplslg123]

Re: DA0U81MB6C0 REV C No Power

Check HWPG

[kalilinux25]

Re: DA0U81MB6C0 REV C No Power

Check HWPG

pin 14 of U15 HWPG no voltage

[kalilinux25]

Re: DA0U81MB6C0 REV C No Power

check hwpg

ad_air 2.7v
ad_type 3.3v
nbswon1# 3.3v
ec_pcie_wake# 3.3v

[mcplslg123]

Re: DA0U81MB6C0 REV C No Power

You have schematic. Trace HWPG signal. It goes to many pwm. What is the resistance on HWPG pin of SIO?? Then check resistance on HWPG pin of PWM's where it is tied. There are two ways-Either you cut track of HWPG pin of PWM one by one and see if HWPG rises after which track cut. Else you can try replacing the pwm's tied with hwpg signal. You can also try lifting the coil connected to pwm one at a time and see if hwpg rises. Everyone have there own way to solve such issues. Start exploring.....

[mcplslg123]

Re: DA0U81MB6C0 REV C No Power

You said EC_PWROK and RSMRST# is not present. Did you checked them when system consumes 100mA?? You need to check whether they rises at that time as on some platforms rsmrst# rises after switching.