820-4924 problens

tlough75

Member
Ok so I got an 820-4924 that has a slightly corroded lcd connector and the microphone connector was burned. I have PP3V42 and PPBUS G3H is 12.56V but no green light. There is no corrosion by the SMC or ISL. Could there still be an SMC issue?
 

2informaticos

Administrator
Staff member
"Check first SYS_ONEWIRE circuit."
I was expecting all U7000 voltages...

Reball SMC, corrosion could affected its solders.
 

2informaticos

Administrator
Staff member
Looks like SYS_ONEWIRE circuit is closed; just missing communication.
Report back after SMC reballed.
If still the same, change it.

I hope you already tried known good Magsafe 2 charger...
 

tlough75

Member
Reballed SMC and no change. I think I stated before that I do not get a green light but I do get a MagSafe light. I?m still getting PPBUS, PP3V42 and PP5V_S5. I?m missing the two ?X239? rails in the G3H list, But I think one has to do with trackpad not being plugged in. Still not getting PP5V_S4 either
 
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2informaticos

Administrator
Staff member
"I think I stated before that I do not get a green light but I do get a MagSafe light"
Do you mean amber light present on the Magsafe?
That is fine, why do you want to get green light?
I was supposing you don't get light on Magsafe at all.
Magsafe should switch from green to amber very fast, even no battery connected.
 

tlough75

Member
Yeah, that Is what I meant. I said in my first post No light but I was mistaken. I get a green/orange light.
 

2informaticos

Administrator
Staff member
You must get 3V3_S5 prior 5V_S4.

"the power rails I have them up to PP5V_S4"
I was supposing 3V3_S5 is present...

Post SMC_PM_G2_EN, PM_BATLOW_L, PM_DSW_PWRGD, PCH_DSWVRMEN, PM_SLP_SUS_L.
Be sure to use original Magsafe 2 85W charger.
 
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tlough75

Member
Oh shoot, yeah just realized I am missing an S5 rail, sorry. Of course I wouldn't get PP5V_S4... late night. Will post results shortly
 
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