820-2915 question

[arnonabuurs]

Hi Guys,

I just got a board in, no light on the charger, still need to test everything. Customer said it had been repaired in Cambodia before as it didn't run on the battery. Now my question is, I noticed R7051 and R7052 pin 2 where both soldered together. Any reason why the other shop would have done this? Desoldering didnt make the Mac work, I guess I need to start with Onewire.

My question is, is there any reason for soldering these resistors together, as it seems it was done on purpose, it was a nice solder bridge.

Thanks

 

[larossmann]

Idiocy on their part. Undo that!

Is PP3V42_G3H present?
Is CHGR_ACIN and CHGR_DCIN present?
is SMC_BC_ACOK present?

 

[arnonabuurs]

Will report back tomorrow, 3am here

 

[larossmann]

3 AM is prime time for board repair!

 

[dukefawks]

You're not using a 85W charger. What is PPBUS without battery?

 

[arnonabuurs]

I am using an original 85 watt Apple charger. Today no more green light. PPBUS at F7040 is 14.13v dropping to 6v and then jumping back to 14.13v. No battery attached only 2 fans and a ram module....

 

[dukefawks]

So which things do we check when there is no green light....

 

[arnonabuurs]

re-assembled machine and did a SMC Reset, machine starts again so one issue solved. Now I have a green light and it says battery not charging (shows charge in right top corner) so back to the battery charge circuit. Will check some vids from Louis how to fix this, if questions will be back.