820-3437-B not turn on, green and orange light.

Dewanbd

Member
820-3437-B not turn on orange light.
Not turning on , no fan , green and orange light.
PPBUS_G3H = 8.5v=8.6
PPBUS_S5_HS_COMPUTING_ISNS = 8.5v=8.6
PPBUS_S5_HS_OTHER_ISNS = 8.5v=
PPDCIN_G3H_ISOL = 14.9v=16.49
PPDCIN_G3H = 14.9v=

PP3V42_G3H = 3.42v=3.42
PPVRTC_G3H = 3.32v=3.3

PP5V_S5 = 5v=5
PP3V3_S5 = 3.32v=3.3
PP3V3_S4 = 3.32v=0 ?????????????????

PP5V_S4RS3 = Dead / Pulsing=0
PP5V_S0 = Dead / Pulsing=0
PPVCC_S0_CPU = Dead / Pulsing=0
No fan spin at all.
Any help please.
Thanks.
 

Dewanbd

Member
Could you please specify which list you don't understand ? specially this value PP3V3_S4 = 3.32v=0 , i don't know from where i should check next? Thanks.
 

2informaticos

Administrator
Staff member
You've posted two values for each power line, why???

And no need to measure the same power rail in different points.
Do you really expect to get different voltage between PPBUS_S5_HS_COMPUTING_ISNS and PPBUS_S5_HS_OTHER_ISNS ?
 

Dewanbd

Member
"Do you really expect to get different voltage between PPBUS_S5_HS_COMPUTING_ISNS and PPBUS_S5_HS_OTHER_ISNS ? " You are absolutely right. Just wasting of time. Never happened again. So any other suggestions?
 

Fanfwe

Member
I think 2informaticos is right, what does "PP3V3_S4 = 3.32v=0" mean ? Do you actually get 3.32V or 0V on PP3V3_S4 rail, it's not clear.
I'm going to assume that your PP3V3_S4 is missing. Can you check S4_PWR_EN ?
 

Dewanbd

Member
Sorry for that stupid job. Here is the right one :
PPBUS_G3H = 8.5v
PPBUS_S5_HS_COMPUTING_ISNS = 8.5v
PPBUS_S5_HS_OTHER_ISNS = 8.5v
PPDCIN_G3H_ISOL = 16.49
PPDCIN_G3H = 14.9v

PP3V42_G3H = 3.42v
PPVRTC_G3H = 3.32v

PP5V_S5 = 5v
PP3V3_S5 = 3.32v
PP3V3_S4 = 0
Hi Fanfwe S4_PWR_EN =0.
 

2informaticos

Administrator
Staff member
Did you try known good LIO flex/board?
Also inspect J9500 pins.

Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L at same time.
 

Dewanbd

Member
This is known good i/o flex /board.
Clean j9500 pins.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L at same time is .36v
 

Dewanbd

Member
PM_SLP_Sx_L signals should pulse 3.3 v at same time and became 0v
PM_RSMRST_L also pulse 3.3 and became 0v. and fan is turn on.
 

2informaticos

Administrator
Staff member
"PM_RSMRST_L also pulse 3.3 and became 0v"
Can you clarify???

"fan is turn on"
Fan remains on, or just pulses?
 

2informaticos

Administrator
Staff member
If you get pulse at PM_SLP_S4_L, check for pulse at all S3 voltages.
Same, if PM_SLP_S3_L pulses, check all S0 voltages.

Can you catch pulse at pins 7 & 3 of U1950?
 
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