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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > Magsafe LED intermittently goes out

Magsafe LED intermittently goes out
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spiff72
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Join Date: Mar 2005
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Nov 4, 2008, 07:05 PM
 
Hey all,

I did a search and couldn't find info on this. I have a 17" MBP that is about 7 months old, and I just noticed yesterday that they Magsafe LED occasionally goes out. It seems to light up again if I disconnect it and reconnect it. It has done this twice in the last half hour.

It seems like the MBP is still getting power (as I type this, the menu bar shows that it is charged, and the system profiler tells me the following:

Charge Information:
Charge remaining (mAh): 5969
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 6017
Health Information:
Cycle count: 126
Condition: Good
Battery Installed: Yes
Amperage (mA): -1063
Voltage (mV): 12382

System Power Settings:

AC Power:
System Sleep Timer (Minutes): 60
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 15
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 20
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 5
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: No

Notice that the AC power is reported to be connected, but not charging.

Is this likely an issue with the brick, or the computer? My next step is to see if my wife's MB adapter does the same thing. I also need to see if it happens while the computer's battery isn't fully charged. I will report back my findings, but has anyone else seen this behavior?

Thanks,
Jeff
"Mac Daddy" - 15" MBP, 2.2 GHz Core i7, 8GB, 750GB HDD
"Mommy Mac" - 13" Macbook, 2.4GHz C2D, 2GB, 160GB
"Baby Mac" - 15" PB, 1.5GHz, 1.5GB, 80GB
64GB iPod Touch (4th gen)
     
TheoCryst
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Join Date: Nov 2005
Location: Seattle, WA, USA
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Nov 4, 2008, 10:23 PM
 
My MB does it pretty often, usually when it's switching from charging to charged (orange to green). No biggie.

Any ramblings are entirely my own, and do not represent those of my employers, coworkers, friends, or species
     
spiff72  (op)
Mac Enthusiast
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Nov 4, 2008, 10:25 PM
 
Seems to make sense.

I ran my battery down halfway, and it hasn't gone out yet (still recharging).

Thanks,
Jeff
"Mac Daddy" - 15" MBP, 2.2 GHz Core i7, 8GB, 750GB HDD
"Mommy Mac" - 13" Macbook, 2.4GHz C2D, 2GB, 160GB
"Baby Mac" - 15" PB, 1.5GHz, 1.5GB, 80GB
64GB iPod Touch (4th gen)
     
Maflynn
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Nov 5, 2008, 08:37 AM
 
I noticed my older 07 MBP had done this at least on one occasion. No big deal since I noticed in the menu bar it still showed as plugged in.
~Mike
     
seanc
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Join Date: Apr 2005
Location: Cambridge, UK
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Nov 5, 2008, 11:36 AM
 
Keep an eye on it, it may develop into being connected, but "not charging", permanently like my MacBook does. This isn't a MagSafe charger issue for me because both do the same on that 1 MacBook but work fine on the other.

Also, next time it does it, turn all the lights out or put your hand over it to see if you can see it glowing faintly.
( Last edited by seanc; Nov 5, 2008 at 03:01 PM. )
     
spiff72  (op)
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Nov 5, 2008, 02:52 PM
 
It did it again after my last post last night. The LED went out as the menubar said "finishing charge" or "completing charge" (or something like that). Again, unplugging it for a moment and plugging it brings the green light back for a little while.

Still haven't tried the magsafe from my wife's MB.
"Mac Daddy" - 15" MBP, 2.2 GHz Core i7, 8GB, 750GB HDD
"Mommy Mac" - 13" Macbook, 2.4GHz C2D, 2GB, 160GB
"Baby Mac" - 15" PB, 1.5GHz, 1.5GB, 80GB
64GB iPod Touch (4th gen)
     
Person Man
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Join Date: Jun 2001
Location: Northwest Ohio
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Nov 5, 2008, 03:28 PM
 
I've had my MBP since June 2007 and it's always done that. No problems yet. *knocks on wood*
     
   
 
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