[SOLVED] 820-2390 not powering on (bad C7771)

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cpdist

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Im still pretty new to board level repair, I have watched around 20+ hours of Louis's videos. So im catching on. But I still have a lot to learn. I do have a schematic and board view for this logic board.

-Looked over the board really well for liquid damage none was found.
-Tried a new keyboard/power button still no fan spin.
- I do get Green light on charger
- Tried another charger

At this point I started measuring power rails started with the main 3 Louis talks about.

ppbus_G3H - 8.4v ( I thought this was suppose to 12v, the schematic says its suppose to be 6v. im a little confused on this)

pp3v42_g3h - 3.44v

pp5v_s3 - missing 0.0v

If you can point be toward the next step that would be great.
 

cpdist

New member
The voltage was 0.3v, I changed that cap measuring 1.1v fixed the issue. Thanks Duke.
I just watched one of the videos from Louis last night that he did this is exact same process. Very helpful stuff.
 
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