MagSafe adapter dim light issue due to broken logic board component?
Greeting,
I have a Mid-2010 MacBook Pro 17” that randomly has weird charging behavior.
The issues:
- sometimes (and only sometimes) the MagSafe adapter gives “dim” light while charging (QUESTION: Why?)
- found a small (grounding?) pin in the case: it should be above the Ethernet port (possible short out issue? Could this be the cause?)
Other:
- moving a bit or unplugging then plugging the MagSafe adapter back in the DC board usually fixes the “dim light” issue
- MacBook works and charges just fine (no slow charging issues and 90% of the times the MagSafe adapter gives normal, not dim light: green when fully charged or discharging and red while charging)
- DC board seems to be in a good condition
- MagSafe adapter and the MacBook’s battery are good and genuine Apple
- no corrosion or burnt areas can be seen on the logic board or the DC board
Possible QUESTION 2..the MagSafe adapter always gives green light while the battery is discharging but plugged in (this can happen under full load: the i7+Nvidia GT 330M draws more power that the 85W power adapter can deliver which is normal). But is it normal that the adapter is not red, but green when this happens? I don’t know that..
Thanks in advance,
Brian
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4 Yorum
The pogo pin is part of the EMI grounding system. Don’t worry one missing is not that big a deal.
Dan tarafından
Thanks. Bit unrelated but I have noticed the MacBook's 3.5mm Jack port - if low impedance but quality headphones/headsets are used - has a constant 'hissing' sound. Some kind of background noise that is independent of the actual loudness setting. I was able to "fix it" by using the Apple USB-C to 3.5 Jack dongle (with an additional USB-C to USB adapter).. Can this background sound caused by a grounding issue?
BrianM tarafından
@brianm12552 - A hiss issue is more an issue of filter logic not working. The adapter you used has a filter circuit inside.
EMI grounding is not the same of hum or whine within poor grounding of the analog signal to a speaker.
Think of it this way… Milk, soda and water all can quench your thirst. Only water is calorie free! So let’s not mix things that on the surface may seem related.
Dan tarafından
Thanks. Sadly, it also happens when I don’t charge the MacBook. Might it be related to that I don’t use the extension cable for the MagSafe adapter? So I just plug the adapter in the wall…
BrianM tarafından