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Old 09-12-2017, 02:20 PM   #1
Join Date: Oct 2014
City & State: Nasice
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Posts: 85
Default NP350 SUSP# signal meaning?

Hi guys, i have Samsung NP350 which had a cap shorted to GND preventing it from working. After replacing it i get standard +5V, +3.3V rails, there is +5V on FAN controller, Bios has +3.3, chipset chip gets warm, front LED's work, power LED turns on when pwrbtn is pressed, LVDS connector has 5V and 19V(LCD_INV), but fan doesn't spin and there is no image on lcd screen.

KB9012QF (ENE) gets:

on/off button signal (3.3V)
reset stays high (3.3V) all the time
pbtn_out gets high (3.3V) after on/off_btn is pressed
sys_on gets high (3.3V) when on/off_btn is pressed
PM_SLP_S3# gets high (3.3V)
PM_SLP_S5# gets high (3.3V)
SUSPEND# gets high (3.3V)

Can anyone tell what those SUSPEND#, PM_SLP_S3#, PM_SLP_S5# are and what are they meant to do?

Is it normal to have SUSPEND# on when system starts?

Note: Laptop sometimes turns on by itself, without pushing on/off button... hm...

Last edited by 6ot4hr; 09-12-2017 at 02:32 PM..
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