Random Shutdown of MacBook Pro

Question

I have had a problem with random shutdowns. For my computer, it will randomly shut down when I am running off the batter power, even when the battery is fully charged. It will only turn on again if I connect the charger and then press the power button. I went to the apple store and they archived and reinstalled leopard, and this seemed to fix the problem for a few days, but now, 4 days later, I have the same problem. Is it a hardware problem or just a power management software glitch?

Answer 1

Hiya,
I had a similar problem, that is, my macbookpro would shut down when the laptop was not switched on, at first when the battery was ~20%-30% and then later on even at ~70%-80%.
It was giving me no warnings whatsoever and after the improper shutdowns the machine would take ages to boot up to the OS.
Prior to that happening, my laptop would never wake up after a sleep, especially when it wasn't plugged in. Safe sleep wasn't working, clamshell mode was causing the laptop to wake up intermittently, the "Automatically adjust brightness when light conditions changes" kept resetting itself and a lot more which I cant honestly remember. After being so impatient, I took the mac to the genius bar. It was about a month before its warranty would expire. The guy there, thankfully a very helpful guy had dealt with the same problem before and he said that it is most likely that the logic board/battery need to be replaced.
They said I would ve had a replacement brand new laptop if it was bought from the same country, but as I had bought it from the States and took it to an Apple Store in London this was not possible under Apple's policy.
About a week later, one of their technicians called me to go pick it up. Half an hour later, he calls again telling me not to go as they had found some problems when they were running their Diagnostic Tests. Eventually after having changed the logic board, the battery the I/O power unit, and installing a brand new hard disk, the laptop was causing problems.
The result : I was offered a new laptop.
Hope this helps.
P.S this all happened about two weeks ago.
Andreas