A1466 820-00165-a Green Light no power

[zcinciev]

HI Guys.

i have this Air board got it with corrosion on it, replaced all of the parts damaged and rewired the damaged contact on r8141(which i replaced and it shows good measurement 100k) PP3V42_G3H side. The light goes green then orange and the voltage on PPBUS_G3H is 8.6v which i was thinking the ISL might be bad on SMC. I replaced the U7501 and reflowed the SMC still the same. Any suggestions please?

Thanks

 

[JohnB8812]

Where was the corrosion? 8.6 is normal. Does CPU VCore pulse at all?

 

[2informaticos]

Does the board start without LIO flex connected?
Also try to start in SMC bypass.

Do you get 3V3_S5/SUS?
Post SMC_ADAPTER_EN, PM_BATLOW_L, PM_RSMRST_L, PM_SLP_SUS_L.

 

[zcinciev]

After replacing all damaged parts powered on showed picture and after few minutes got stuck and didn't power on again. Tried another I/O board just green light and after 5sec orange...

r8141 replaced and rewire the PPBUS_G3H
J6100 Removed was with corrosion
c7090 & 7091 replaced
c7797 replaced
r5127 replaced


SMC_ADAPTER_EN - 3.4v
PM_BATLOW_L - 3.3v
PM_RSMRST_L 3.28v
PM_SLP_SUS_L - 3.33

 

[zcinciev]

All measurement without KB connected but also tried with all connected same result.

 

[2informaticos]

Any pulse at PM_SLP_S5_L and 5V_S4?
If yes, check if other big coils pulse, maybe ALL_SYS_PWRGD too.

"Also try to start in SMC bypass."

 

[zcinciev]

No pulses.

Can you please let me know how to start in SMC bypass?

Thank you

 

[2informaticos]

You should find a solution here...
https://boards.rossmanngroup.com/search?q=smc+bypass&searchJSON={"keywords":"smc+bypass"}

 

[zcinciev]

no luck ... any idea ?

 

[2informaticos]

Do you mean not starting in SMC bypass?
3V3_SUS present?
PM_PWRBTN_L reacts when trigger SMC_ONOFF_L?

 

[zcinciev]

PP3V3_SUS present, PM_PWRBTN_L yes reacts when trying to power on the power pads

 

[2informaticos]

Do you get a pulse at PM_SLP_S5/4/3_L at the same time?
If yes, check on the big coils for pulse too.
Also check for reaction at ALL_SYS_PWRGD.

 

[zcinciev]

No nothing...

 

[2informaticos]

Check now S5_PWRGD, PM_DSW_PWRGD and PCH_DSWVRMEN.
Also check all RTC signals, at page 12.

 

[zcinciev]

S5_PWRGD - R8141 contact 2 3.42v
PM_DSW_PWRGD 3.42
PCH_DSWVRMEN 3.2
PPVRTC_G3H - 3.3
PCH_SRTCRST_L 3.3
RTC_RESET_L - 3.3

 

[2informaticos]

All signals look good.
However, you forgot PCH_INTVRMEN and PCH_INTRUDER_L.
If also present, but none of PM_SLP_Sx_L signals react at same time with PM_PWRBTN_L, should be bad PCH.
Put good flux and heat it, maybe is only crap underneath PCH.
Check first if 1V05_SUS is present.

 

[zcinciev]

1V05_SUS is present
PCH_INTVRMEN 2.2
PCH_INTRUDER_L 3.3

 

[2informaticos]

"PCH_INTVRMEN 2.2"
Solder 100K on R1302 and see if goes higher.

 

[zcinciev]

Just noticed PP5V_S5 is 4v

 

[zcinciev]

I've soldered 100k on top of r1302

PCH_INTVRMEN is 3.3v now and PP5V_S5 is 5v