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820-3437 No 5v

gadgetfix

gadgetfix

New member
Hey guys.

This one was working fine. Refused to turn on one day. NO drop. NO waterdamage.
Upon inspection found short on ppbus_g3h. Removed short.

I cant see pp5v_s5 missing.
 
T

ThisIsWes:AASP

Member
So many questions..
Do you have a light/ any fan spin now? Where was the short and is it gone now? Did you replace the component?
What do you mean you can’t see pp5v_s5 missing?
How does U7501, J4800/L4820/C4810 and U7400 look?
 
gadgetfix

gadgetfix

New member
ThisIsWes:AASP said:
So many questions..
Do you have a light/ any fan spin now? Where was the short and is it gone now? Did you replace the component?
What do you mean you can’t see pp5v_s5 missing?
How does U7501, J4800/L4820/C4810 and U7400 look?
Click to expand...

no light no fan spin
short was on c7090 i found through flir
when i say pp5v is missing i mean its 0v
U7501, J4800/L4820/C4810 and U7400 look fine
 
Last edited:
D

dukefawks

Administrator
No light and PPBUS at 8.2V means SMC is not running. Check SMC_RESET and check for crap in SMC area or dead SMC.
 
D

dukefawks

Administrator
"Did you try a good i/o board and cable? Good power supply? "

I am sorry but this has NOTHING to do with PPBUS being 8.2V. That is just swapping parts and hoping it helps. You should diagnose, not swapping parts.
 
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