Please I would like to know :
What difference between ALW , SUS, and RUN voltages ? are all present when laptop is shutdown ?
Is KBC working while laptop is shutdown ?

Did you see that?

ALW - as you can see, is an ALWAYS voltage rail. It will be on AC power
SYS (VS) - system = RUN - it will be in S0 state (full power on, normal work)
SUS - SUSTAIN - it is in S3, s4 power state.


A small part of KBC. (Some KBC have have RTC section and power from RTC power supply)

Please could you explain more about S1 S3 S5 signals and thanks so much

Read articles. use google. Also there is some info on our forum. (methodics)

S1/S2/S3/S4/S5 and others - it is a power states of ACPI.

Also ICH7
Rapairing NB for beginners

Do not be lazy. It's all.

I shall do thanks so much...........