MacBook Pro shuts down when unplugging... battery fine!

[MIDI_EVIL]

I have a MacBook Pro (late 2008), which for the last two months, has been shutting down when unplugging. This doesn't happen on every instance, but probably around 75% of the time. This can happen with either a full battery, or anything less. It has no difference.

The battery has a 241 load cycle, and the system profile is: Normal.

I have done numerous PRAM and SMC reset.

I have an appointment with a 'genius' this Sunday, but over the last few days it seems to have temporarily stopped happening.

Another symptom is that if it doesn't switch off when unplugging, it switches off if I move it...

Is this familiar to anyone?

I have videos to show Apple, incase I can't replicate the fault...

 

[heisenberg123]

I have a MacBook Pro (late 2008), which for the last two months, has been shutting down when unplugging. This doesn't happen on every instance, but probably around 75% of the time. This can happen with either a full battery, or anything less. It has no difference.

The battery has a 241 load cycle, and the system profile is: Normal.

I have done numerous PRAM and SMC reset.

I have an appointment with a 'genius' this Sunday, but over the last few days it seems to have temporarily stopped happening.

Another symptom is that if it doesn't switch off when unplugging, it switches off if I move it...

Is this familiar to anyone?

I have videos to show Apple, incase I can't replicate the fault...

did you check the battery connector hasnt come loose?

 

[GGJstudios]

I have a MacBook Pro (late 2008), which for the last two months, has been shutting down when unplugging. This doesn't happen on every instance, but probably around 75% of the time. This can happen with either a full battery, or anything less. It has no difference.

The battery has a 241 load cycle, and the system profile is: Normal.

Have you calibrated your battery recently? This should answer most, if not all, of your battery questions:

Apple Notebook Battery FAQ​

I have done numerous PRAM and SMC reset.

PRAM/NVRAM has nothing to do with battery/power/charging issues. Resetting it will not help. Only resetting the SMC addresses such issues.

 

[MIDI_EVIL]

did you check the battery connector hasnt come loose?

Hi!

Yes, I tested the battery seating. It was ok... and the problem persisted.

AppleCare tech support think it could be an issue with the logic board, which has already been replaced once already...!

----------

Have you calibrated your battery recently? This should answer most, if not all, of your battery questions:

Apple Notebook Battery FAQ​

PRAM/NVRAM has nothing to do with battery/power/charging issues. Resetting it will not help. Only resetting the SMC addresses such issues.

Thanks,

I try and do a battery calibration at least once a month. I tried this as soon as the issues arose, but unfortunately they continued.

I did a PRAM and SMC reset as advised by Apple tech... how strange.

 

[GGJstudios]

AppleCare tech support think it could be an issue with the logic board, which has already been replaced once already...!

It's possible they didn't replace it properly.... loose connector, etc. I'd certainly have them check it out.

I did a PRAM and SMC reset as advised by Apple tech... how strange.

I'm not surprised. As I said, the NVRAM/PRAM doesn't relate at all. It's important to remember than "Genius" is only their job title, and not necessarily an indication of their knowledge, experience or expertise.

 

[MIDI_EVIL]

It's possible they didn't replace it properly.... loose connector, etc. I'd certainly have them check it out.


I'm not surprised. As I said, the NVRAM/PRAM doesn't relate at all. It's important to remember than "Genius" is only their job title, and not necessarily an indication of their knowledge, experience or expertise.

You're probably right. It does seem as though it could be something that's loose.

What bothers me is that it's already had a logic board replacement, they think it may be the same problem!

I have professional work to get done!!!

 

[MIDI_EVIL]

Update: for anyone who contributed or read my thread...

Well, I've just had my second logic board replacement, and the symptoms still persist. Still random. Still shutting down.

The new logic board, a nice 2.66 ghz upgrade from 2.53, had the flickering screen issue with the 9400. After a EFI firmware update this seems to have been fixed.

I've managed to speak directly to a senior technician at Apple, and if it has one single issue more, they will replace the machine!

There are two new problems now, the audio output jack is very loose, and I can only display 7.75GB of RAM when it was previously displaying 8GB...

The machine is off with Group 8 in the UK for a third repair...

 

[MIDI_EVIL]

Update: for anyone who contributed or read my thread...

Well, I've just had my second logic board replacement, and the symptoms still persist. Still random. Still shutting down.

The new logic board, a nice 2.66 ghz upgrade from 2.53, had the flickering screen issue with the 9400. After a EFI firmware update this seems to have been fixed.

I've managed to speak directly to a senior technician at Apple, and if it has one single issue more, they will replace the machine!

There are two new problems now, the audio output jack is very loose, and I can only display 7.75GB of RAM when it was previously displaying 8GB...

The machine is off with Group 8 in the UK for a third repair...

UPDATE 2:

Well, I got my machine back from Group8 today, and the same problems persisted. I also had bad pitting under the machine due to a chemical reaction with the aluminium.

I contacted the Senior Apple Technician in the UK who said it was unacceptable and is now replacing my machine with a 2.2 Quad i7!

I'm over the moon!