WHY WON'T MY COMPUTER STAY ON?

When I turn my computer on, the light on the lower right hand corner doesn't stay on. Additionally (and more importantly) when my computer goes to sleep, it actually shuts off. It used to just go to sleep and I could hit a key to get it back on. Now it just shuts off when it goes in to sleep mode. Thanks, NLVS
Mac OS X Mac OS X (10.3.9)

nlsv,
As Reese pointed out, this is wrong forum for your particular question.
However, there is a long discussion about folks whose Macs are randomly shutting down over in the MacBook forum. You may want to check out the forum thread and see if anything applies to your situation...
http://discussions.apple.com/thread.jspa?threadID=544012&tstart=15
The problem was also mentioned on MacFixIt today and on the 7/14 edition of The MacCast.
HTH,
Steve

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Step 1
Take all the steps suggested in this support article. That's the starting point for any further effort to solve the problem. Skipping any of those steps may mean that the problem won't be solved. Note that, as stated in the article, the computer will not sleep if Internet Sharing is enabled.
Step 2
From the menu bar, select
 ▹ System Preferences ▹ Accessibility ▹ Speakable Items: Off
Step 3
Select
 ▹ System Preferences ▹ Bluetooth ▹ Advanced...
and uncheck both boxes marked
Open Bluetooth Setup Assistant at startup if...
Step 4
Reset the SMC.
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Disconnect all wired peripherals and test. If you use a wired keyboard and/or mouse, use different ones. You must rule out the wired keyboard and mouse as possible causes of the problem.
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Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
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