820-00165 - S3/S4 Pulsing

menatwork

New member
PPBUS_G3H = 8.56V
PPVRTC_G3H = 3.3V
PP5V_S5 = 5V
PP3V3_SUS - 3.3V
PP3V3_S3 - 3.3V
PP3V3_S5 - 3.3V

PM_SLP_S3_L = PULSING
PM_SLP_S4_L = PULSING

WITHOUT FLEX CONNECTED
PM_BATLOW_L = 3.3V
PM_RSMRST_L = 3.3V
PCH_DSWVRMEN = 3.23V
PM_DSW_PWRGD = 3.4V

I Trigged SMC_ONOFF_L and PM_PWRBTN_L and my PM_SLP_S3/S4 Drops

Any hint?

Thank you!!!
 
Last edited:

2informaticos

Administrator
Staff member
"PP3V3_S3 - 3.3V
-----------------
PM_SLP_S4_L = PULSING"
Are you really sure???
Please recheck and post accurate information.

Pulsing every 5s, or how?
Any information is important.

Did you try to start in SMC bypass mode?
 

menatwork

New member
I'm sorry...
PP3V3_S3 = Pulsing (0 to 3V)
PM_SLP_S4_L = Pulsing
I Did SMC bypass mode and nothing happen.
PP5V_S5 = 5V
PP3V3_S5 = 3.3V
 

2informaticos

Administrator
Staff member
If you get pulse at PM_SLP_S4/3_L, then you should get pulse at almost all big coils; maybe not CPU ones.
Check for pulse at pins 7 & 3 of U1950.

"Pulsing every 5s, or how?
Any information is important."
 

2informaticos

Administrator
Staff member
If so, VCORE should pulse too.
Try to post all information when you start a thread.

PLT_RESET_L pulsing at least?
Check for pulse, or short all voltages from pages 57/58.
Also check the L/C blocks near CPU, close to board edge.

Did you try known good BIOS file?
Any history fault available?
 

menatwork

New member
PLT_RESET_L = Pulsing
PPVCC_S0_CPU = Pulsing
PP1V8_S3 = Pulsing no short to ground
PP1V05_SUS = 1.05V

The board had a liquid damage and cleaned properly. The liquid damage are was around U7400 and U7600.
The bios was fine actually, but i can reprogram if that is the case.

I will check the rest and back to you
 
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