Vista Shuts down when Unplugged

[bbcheckmate]

I used Bootcamp to install Vista on my Mac Book Pro 2.4 Ghz (April '08). It has been working very well until Dec 2008. While running a PC game on battery, Vista operating system would just shut down unexpectedly. If the machine is plugged in, it would work fine. Currently the problem is getting worse; when I boot up into Vista on battery, it would shut down in about 2-3 minutes.

Initially I thought it was a battery problem. I booted up into Leopard and checked the battery information in System Profiler. I didn't see any problem. 332 cycles and condition is "Good." In addition, Leopard works just fine on battery. Does anyone have any idea about this?

Thank you for all your help!

 

[LtRammstein]

What are your power settings set at in Vista?

I bet if you modified those settings, you'd get a good idea on what's going on.

 

[bbcheckmate]

Do you mean the "Power Options" in Control Panel? There's only three options: "Balanced", "Power Saver", and "High Performance." It's currently selected in "Balanced" and the only settings I can change are "turn off the display" and "put the computer to sleep" for on battery and on AC power. There is also "change advanced power settings" option but I didn't change anything since I installed vista. Thanks.

 

[Stridder44]

Do you mean the "Power Options" in Control Panel? There's only three options: "Balanced", "Power Saver", and "High Performance." It's currently selected in "Balanced" and the only settings I can change are "turn off the display" and "put the computer to sleep" for on battery and on AC power. There is also "change advanced power settings" option but I didn't change anything since I installed vista. Thanks.

Well that's where you'd want to look. Advanced power settings has all kinds of options for everything.