820-3437-B dead

vsa100

New member
Hi!

I have here a 820-3437-B board: fan is not spinning, but i have orange/green magsafe light.
No water damage, no drops and under scope inspection everything seems to be nice and clean.
Where you suggest start checking?

Thanks!!!
 

2informaticos

Administrator
Staff member
Posting some (exact) voltages from the board.
Like 3V3_S5/SUS and PPBUS_G3H.
Good if you post more...
 

JohnB8812

New member
Your issue is PPBUS it should NOT be 8.2 but rather 8.6. SMC_RESET_L voltage? This is looking like a bad SMC to me. Post that voltage first
 

2informaticos

Administrator
Staff member
If you get orange light, SMC_RESET_L should be good.
3V3_S5 present also means SMC_PM_G2_EN is OK.

I asked about 3V3_SUS and no response.
If miss it and also PM_SLP_SUS_L, then check all (4) RTC signals from page 12.
 

vsa100

New member
If you get orange light, SMC_RESET_L should be good.
3V3_S5 present also means SMC_PM_G2_EN is OK.

I asked about 3V3_SUS and no response.
If miss it and also PM_SLP_SUS_L, then check all (4) RTC signals from page 12.

Sorry, i've missed that.
3V3_SUS: 3.3v
 

2informaticos

Administrator
Staff member
"PM_SLP_SUS_L is 1.06v"
That is bad, should be 3V.
Are you sure?
Strange to get 3V3_SUS then.

If symptom changed after reflowed SMC, reball it.
If still the same, then change it.

Please do NOT quote entire post visible few centimetres above...
 
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