A1278 not starting and faint/dim light on charger
Hi there!
I have a question regarding a MacBook Pro A1278 from a customer.
The customer said the macbook did not start from one to another day after having the famous big cross at his battery saying it needed to be replaced for months now.
The customer tried different chargers all to no success.
What i have tried:
2 Different chargers, of wich 1 is brandnew.
Old DC-In board does the same as a brand new DC-In board, they both show up (with or without internal battery connected) as a faint/dim green light.
Disconnected everything, swapped memory etc, it keeps faint/dim.
All ram resets possible, nothing.
Now what we do know is that the battery is faulty but even without the battery attached on the logic board it does the same, it shows no life whatsoever in any way possible.
I do feel that there was alot of dust on the bottom side, i cleared it all but but it seemed quite alot. Also, a few screw points seem to be a little brownish, it almost seemed like water spills corrosion but i could not find any white residue anywhere on the logic board itself.
Anyone that might have another idea or will this probably be a logic board that died here?
Thanks in advance!
6条评论
Thanks for the down vote Kevin for trying to help you. Good Luck!
由 mayer 完成的
Do not take it personal mate but it does not help me in any way whatsoever when i already explained everything was disconnected. I understand that you have experience with certain cables causing malfunction but when they are not connected they are certainly being ruled out for being the cause, i figured you already comprehended that when i explained the situation. If you get upvoted people think this can be the cause after reading my story about having everything disconnected already.. anyways.. again.. do not take it personal!
由 Kevin 完成的
Besides switching out components, what have you checked? Did you check F6905 to make sure it is showing continuity? Did you check to see if you have power on PPVBAT_G3H? Did you check F7040 for continuity? What voltage do you get on PPDCIN_S5_P3V42G3H? BTW upvotes are a simple way for saying "thank you for trying to help out" Accepting an answer is for " Great it worked", downvotes should be reserved for blatantly wrong answers. downvoting somebody that is trying to help you is a bit harsh and rude.
由 oldturkey03 完成的
I have no experience in checking certain voltages out, since everybody has to do it for the first time there is always time to learn. However when you point out certain components that are disconnected that might be the cause of the malfunction it seems you are on the wrong answer. You are taking this way too personal though, i thank you for helping but like you said yourself downvoting is reserved for wrong answers, wich i think it is when everything you spoke about was already noted as not even connected. Once again, do not take it personal, i rather have you said what u said now right away because when i check up on a schematic and see if certain values are there or not we can get somewhere.
由 Kevin 完成的
Kevin, you are talking two different people here "You are taking this way too personal though," I do not take it personal, just trying to get you to check on other things. "However when you point out certain components that are disconnected that might be the cause of the malfunction it seems you are on the wrong answer." I don't think that you will find anywhere that I suggested any of this. Best thing for you to do, is to follow lemerise guidance.
由 oldturkey03 完成的
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